Similar Questions

• Server has a small ephemeral Diffie-Hellman public key ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY

  Hello

  I first Cisco and I get the following error when I go to open a session. I used IE, Chrome, Firefox, but have the same condition. To get the solution.

  Server has a low public key ephemeral Diffie-Hellman

  ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY

  Create a new shortcut and click on the link provided to run the program.  Make sure that Chrome is in the right place of the folder.

• Server has a weak and ephemeral Diffie-Hellman public key

  Seems 45 Chrome and Firefox 40 block ciphers DHE

  Today, we get the following errors when you browse the vRO Web Interface (and the Configuration interface)

  Tested with the device of the two vRO 6.0.1 and 6.0.2 versions

  Everyone knows this?  And is there no work around better than using the '-cipher-suite-blacklist = "parameter in Chrome?

  I have raised a support ticket with VMware, but thought it would be an idea to post here as well.

  Chrome:

  

  Server has a weak and ephemeral Diffie-Hellman public key

  ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY

  Hide details

  This error can occur when you connect to a secure (HTTPS) server. This means that the server tries to establish a secure connection, but because of a disastrous misconfiguration, the connection would be not sure at all!

  In this case, the server must be fixed. Google Chrome will not use unsecured connections to protect your privacy.

  Learn more about this problem.

  Firefox:

  

  The secure connection failed

  An error occurred during a connection to vro-device - hostname:8283. SSL has received a low ephemeral Diffie-Hellman key in the handshake message exchange the server key. (Error code: ssl_error_weak_server_ephemeral_dh_key)

  The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.

  Contact the web site owners to inform them of this problem.

  You can try to change the two server.xml file in: / etc/vco/app-server and/etc/vco/configuration in the update of the file server.xml "ciphers" attribute by removing TLS_DHE_... ciphers. Then, restart the vco-server, vco-configuration services server vco and vco-configuration services

• I can't connect to my VMware vCenter Assistant support

  I led to vCenter Assistant support.  When I run the Diagnostics, all the controls of spend.  When I try to connect to my VMware using my valid credentials, I get the message "Invalid credentials, please check your user name and password".

  I know that my credentials are correct and work because I can connect to My VMware directly using the same username and password as I train with the vCenter Assistant support.

  Someone had comparable issues, or have any suggestions as to what could go wrong?

  See you soon

  Ant

  It turns out the proxy server for the company was the origin of the problem.  Guys the network here that sorted and everything started to work properly.

• not checking ephemeral Diffie-Hellman key to CAUSE low mail SSL

  Nice day

  I made an update of mozilla any last night and for some reason, thunderbird will not send email from 2 of my accounts that are located on the same server. He tells me that it is connected to this server, but never offers anything from him. It worked well until this recent update that was made. Any help is appreciated.

  The error means that your e-mail provider's server is not properly configured and exposes you to the attack of the impasse. Thunderbird strives to prevent this.
  https://weakdh.org/

  To work around the problem, you can install this add-on.
  https://addons.Mozilla.org/en-us/Firefox/addon/disable-DHE/

  Note, this will allow you to connect to the server in a secure way, but there isn't the underlying problem of the server is still vulnerable.

  See this article if you have problems to install the add-on for Thunderbird.
  http://Xenos-email-notes.simplesite.com/416814616

• What does that mean 'APEX server has a vulnerable temporary Diffie-Hellman public key?

  Hello

  I use Oracle Cloud Services and I have already created and deployed a java (.war) via two managed servers.

  Now I use cloud services, but the concept should be the same: I would like to have access to the APEX (https://my_dbaaas_ip/apex/pdb1/), but I get the following security message:

  «The server has vulnerable temporary public Diffie-Hellman key...» »

  I also checked to calculate Service (network, safety rules) and port 443 is open and I also created a tunnel via ssh...

  Someone had the same warnng to access the APEX to develop the java application?

  Thank you very much

  Skender

  I think it's a problem of security defined by the Chrome browser...

  Now only accessed via a different browser and it worked!

  Skender

• vulnerability of Diffie-Hellman < 1024 Bits (dead end) on the VPN

  Hello world

  Scans of external provider shows a vulnerability for Diffie-Hellman< 1024="" bits="" (logjam)="" on="" the="" vpn ="" on="" our="" cisco="" asa="" running="">

  No idea how can I fix on Cisco ASA 5520?

  Concerning

  Mahesh

  IT depends on how the analysis was done. If only they check your turned to the public outside the address and then only having do not SSL services on it will make the vulnerability "disappear".

  If you need the service out of all interfaces, you need to upgrade so that the SSL services are patches they are seen on any interface.

  Or you could simply not patch and accept the risk.

• Diffie-Hellman - ASA firewall groups

  Hi all

  A couple of questions I hope you can help me with that.

  Please can you tell me where I would change the Diffie-Hellman group for phase 1 on an ASA firewall and is - it possible on the ASDM?

  Also, you must enable PFS have to DH on the phase 2?

  Thank you very much

  Alex

  Hello Alex,.

  You can change the Diffie-Hellman group for phase 1 of ASA by configuring the following command:

  crypto ISAKMP policy

  Group

  To configure the same ASDM, go to the

  Configuration > VPN Site to Site > connection profiles > add/edit

  You will find in settings, IPsec, encryption algorithms. Click on 'Manage' icon on the right of "IKE policy". Click OK.

  Click on Add/Edit and there will be an option to change the Diffie-Hellman group.

  And finally, what about the PFS application, you can enable PFS to be DH in phase 2. activation of PFS will force a new Exchange of key DH for phase 2.

  Note: it is not mandatory, its optional. If its configured on one side, then it must be on the remote side as well.

  Kind regards

  Dinesh Moudgil

• Change of SSL/TLS group Diffie-Hellman on ASA 5520

  dh-group SSL control was introduced in 9.3 (2) which is not available to ASA 5520. Is others possible to force ssl vpn to use the diffie-hellman > 1024 bits on this system?

  Sorry miss-read the question.  As far as I know, we can't specify the Diffie-Hellman on the SAA group before 9.3 (2).

  --

  Please do not forget to select a correct answer and rate useful posts

• What power of the Diffie-Hellman encryption and authentication hash group do you use?

  Hi guys,.

  I just want to understand what people are using and prefer the investigation.

  • Diffie-Hellman group do you use or do you think is enough?
  • What Type of encryption & bits do you use?
  • What Type of hash & bits do you use?
  • Do you use the same parameters for Phase 2?
  • Do you use the Diffie-Hellman PFS for Phase 2 group?

  To make things more neat, you can respond to the following format:

  Phase 1 ISAKMP policy

  • Diffie-Hellman Group 5
  • AES 128
  • SHA 384

  IPSec policy phase 2

  • No PFS
  • AES 256
  • SHA 256

  Andrew,

  Cisco's perspective on what the client should work at least.

  http://www.Cisco.com/Web/about/security/intelligence/nextgen_crypto.html#16

  M.

• VCenter does support 32 bit address post?

  Hello

  IM installing vCenter on a 32-bit Windows 2008 with 4 GB of RAM.

  We intend to add more memory shortly.

  VCenter does support 32-bit address extension, is there any known issues?

  Thank you

  x 86 is not an identification for 32 bit, which is a hardware platform.  See release notes

  http://www.VMware.com/support/vSphere4/doc/vsp_esx41_vc41_rel_notes.html

  vCenter Server 4.1 supports installation on platforms Windows 64 - bit only. If you have VMware VirtualCenter 2.x installed, see vSphere Upgrade Guide for instructions on installing vCenter Server on a 64-bit operating system and preservation of your VirtualCenter database.

• vCenter Converter support for dvSwitch and Nexus 1000v

  Nothing changed since it was published in May 2009:

  http://www.VMware.com/support/vSphere4/doc/vsp_vcc_41_rel_notes.html

  VMware vCenter Converter vCenter Server 4.0 | May 21, 2009 | Build 161418

  Document last updated: May 21, 2009

  Import and export tasks fail when a vNetwork Distributed Switch is selected as the network for the virtual machine target

  When you create an import or export tasks and select a vNetwork Distributed Switch in the choice of the network for the virtual machine target, the task begins but does not immediately with the following error message: unknown error returned from agent vCenter Converter. This problem appears when you use the wizards to import or export or the convert Command Line Interface (CLI) tool to create the task.

  Solution: Select a network to the computer virtual target that is not a vNetwork Distributed Switch.

  We had this problem a few weeks back and see how this problem exists since last year, vCenter 4.0 Update 1 or 2 this address?  Thank you.

  Hi Terran0925,

  According to the "Known issues" section in the release notes for "VMware vCenter Converter vCenter Server 4.0 Update 1 | November 19, 2009 | Build 206170 "to http://www.vmware.com/support/vsphere4/doc/vsp_vcc_41u1_rel_notes.html#resolvedissues , the question was always present.

  There is no mention of the issue on the VMware vCenter Converter vCenter Server 4.1 release notes. The release notes can be found at http://www.vmware.com/support/vsphere4/doc/vsp_vcc_42_rel_notes.html

  The details of this version are;

  VMware vCenter Converter 4.2 | July 13, 2010 | Generation 254483

  vCenter Server 4.1 | July 13, 2010 | Build 258902

  Note: in order to get this version of VMware vCenter Converter vCenter Server, you must upgrade your vCenter server for "vCenter Server 4.1 | July 13, 2010 | Build 258902.

  I hope this helps.

  Kind regards

  Graham Daly

  Champion of knowledge

  VMware Inc.

• 38.1.0, getting new mail is no longer works. Bug CAUSE deadlock/weak Diffie-Hellman for key 1185060 SOLUTION mitigation requires the TLS/SSL security key length &gt; = 1024

  That's about all. After the upgrade, I can no longer receive mail. I can send, but it does not put a copy in the "sent" folder and I get an error.

  "There was an error saving message in sent. Try again? »

  But the message on the other end.

  I checked the same email on my phone and Webmail accounts. No problem.

  I deleted the account and tried to add it back, but get an error:

  "Invalid username or password"
  "Setup could not be verified - is the name of user or wrong password?

  The user name and password are correct. Yet once, nothing changed with the account mail and it market in Webmail and on my iPhone.

  Any help would be greatly appreciated!

  Same problem here. In my case, I control the server. So I had my software update server admins and install a 2048-bit key instead of the old key of 768 bits. (By the way, for those who have their own server faced with this problem, you must switch to cPanel/WHM 11.5 to be able to upgrade the key. Older versions store more 768 bit keys for SSH.)

  Now, most of my accounts work. However, one account is always the error.

  When I check the error console, I find the following:

  Timestamp: 22/07/2015 08:44:35
  Error: An error occurred during a connection to [domain]: 143.

  Cannot communicate securely with counterpart: no common encryption algorithm.

  (Error code: ssl_error_no_cypher_overlap)

• Invalid key exception: no type of key: public key RSA Sun, 1024 bits

  I'm trying to recover Microsoft Keystore certificates and extract its key using SunMSCAPI in the jdk 1.6. It gives me an exception for invalid key when I try to wrap the symmetric key (what was once to perform AES encryption on data), using the RSA algorithm.
  
  Code snippet:

             // RSA 1024 bits Asymmetric encryption of Symmetric AES key              
              // List the certificates from Microsoft KeyStore using SunMSCAPI.
                    System.out.println("List of certificates found in Microsoft Personal Keystore:");
  
                     KeyStore ks = KeyStore.getInstance("Windows-MY", "SunMSCAPI"); 
                     ks.load(null, null) ;
                     Enumeration en = ks.aliases() ;
                     PublicKey RSAPubKey = null;
                     Key RSAPrivKey = null;
                     int i = 0;
                     while (en.hasMoreElements()) {
                          String aliasKey = (String)en.nextElement() ;              
                          X509Certificate c = (X509Certificate) ks.getCertificate(aliasKey) ;     
                          String sss = ks.getCertificateAlias(c);
                          if(sss.equals("C5151997"))
                          {
                          System.out.println("---> alias : " + sss) ;
                          i= i + 1;
                          String str = c.toString();
                          System.out.println(" Certificate details : " + str ) ;
                        RSAPubKey = c.getPublicKey();
                          RSAPrivKey = ks.getKey(aliasKey, null);  //"mypassword".toCharArray()
                          Certificate[] chain = ks.getCertificateChain(aliasKey);     
                          }
                     }
                     
                     System.out.println("No of certificates found from Personal MS Keystore: " + i);
                  
              // Encrypt the generated Symmetric AES Key using RSA cipher      
                      Cipher rsaCipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", ks.getProvider().getName());            
                     rsaCipher.init(Cipher.WRAP_MODE, RSAPubKey);
                     byte[] encryptedSymmKey = rsaCipher.wrap(aeskey);    
                     System.out.println("Encrypted Symmetric Key :" + new String(encryptedSymmKey));
                     System.out.println("Encrypted Symmetric Key Length in Bytes: " + encryptedSymmKey.length);
                     
                     // RSA Decryption of Encrypted Symmetric AES key
                     rsaCipher.init(Cipher.UNWRAP_MODE, RSAPrivKey);
                     Key decryptedKey = rsaCipher.unwrap(encryptedSymmKey, "AES", Cipher.SECRET_KEY);

  Output:
  
  List of certificates in Microsoft personal Keystore:
  -> alias: C5151997
  Certificate details:]
  [
  Version: V3
  Object: CN = C5151997, O = SAP - AG, C = OF
  Signature algorithm: SHA1withRSA, OID = 1.2.840.113549.1.1.5
  
  Key: Sun public key RSA 1024 bits
  modulus: 171871587533146191561538456391418351861663300588728159334223437391061141885590024223283480319626015611710315581642512941578588886825766256507714725820048129123720143461110410353346492039350478625370269565346566901446816729164309038944197418238814947654954590754593726047828813400082450341775203029183105860831
  public exponent: 65537
  Validity: [from: Mon Jan 24 18:17:49 IST 2011,]
  [To: Wed Jan 23 18:17:49 IST 2013]
  Issuer: CN = SSO_CA, O = SAP - AG, C = OF
  Serial number: [4d12c509 eb85 00000005]
  
  Certificate extensions: 6
  [1]: ObjectId: 2.5.29.14 criticality = false
  [SubjectKeyIdentifier
  [KeyIdentifier
  0000: 07 E5 83 A1 B2 B7 DF 6 b 4 b 67 1 and 9 D 42 C9 0 D F4... kKg... A.M..
  0010: 35 76 D3 F7 5v...
  ]
  ]
  
  [2]: ObjectId: 2.5.29.35 criticality = false
  [AuthorityKeyIdentifier
  [KeyIdentifier
  0000: E4 C4 2 93 20 AF DA 4 C 53 68 4A C0 CE E7 F2, 30. .. L.ShJ... 0
  0010: 0C 3 B 8 C 9 A. ;.
  ]
  
  ]
  
  [3]: ObjectId: 1.3.6.1.4.1.311.21.7 criticality = false
  Unknown extension: coded DER BYTE string =
  0000: 04 30 30 2 06 26 2 b 06 01 04 01 82 37 15 08 82.00... & +... 7...
  0010: D1 E1 73 E4 84 FE 0B FD 84 8 B 15 83 E5 1B 90 83... s.............
  0020: 43 81 62 84 B1 A1 E6 DA 50 14 02 01 64 02 9TH D3... C.b... P...d.
  0030: 01 1B...
  
  
  [4]: ObjectId: 2.5.29.17 criticality = false
  [SubjectAlternativeName
  RFC822Name: [email protected]
  ]
  
  [5]: ObjectId: 2.5.29.15 criticality = true
  [KeyUsage
  DigitalSignature
  Non_repudiation
  Key_Encipherment
  Data_Encipherment
  ]
  
  [6]: ObjectId: 2.5.29.19 criticality = true
  BasicConstraints:]
  CA:false
  PathLen: undefined
  ]
  
  ]
  Algorithm: [SHA1withRSA]
  Signature:
  0000: B3 C5 8 66 92 F4 CC D7 ED 6 51 12 63 52 18 B9... f... mQ.c... R.
  0010: B8 A6 78 7 78 18 ED F7 DA 71 09 AE 49 23 C8 C9... .. x...x. q... I have #.
  0020: F5 2F 32 0F D1 C0 08 4 2 B 6 D 3 C B9 5F 5B B5 11. 2 /... L + m <... _ [.]
  0030: 05 D9 CA E6 F9 0 a 94 14 E7 C6 7 a 63 DB FE E5 CE... z.c...
  94 0040:48 8 c 0D 77 92 59 34 6 77 1 a 24 FE E3 C1 H...w. Y .4nw$...
  0050: 0 B 52 6 D8 HAS 7TH 22 13 71 F8 AF 17 64 4F C8 D1 D7... RJ. ». q... dO
  0060: 83 EA 2D 6a CA 7F C3 84 37 15 FE 99 73 1 D 7 C D1... - j... 7... s...
  0070:6 B4 99 09 62 B9 0F 18 33 4 66 C6 7 a 9F C0 DB m... b... 3L. FZ...
  
  ]
  None of the found certificates in personal key MS: 1
  Exception in thread "main" java.security.InvalidKeyException: unsupported key type: RSA Sun public key, 1024 bits
  modulus: 171871587533146191561538456391418351861663300588728159334223437391061141885590024223283480319626015611710315581642512941578588886825766256507714725820048129123720143461110410353346492039350478625370269565346566901446816729164309038944197418238814947654954590754593726047828813400082450341775203029183105860831
  public exponent: 65537
  at sun.security.mscapi.RSACipher.init(RSACipher.java:176)
  at sun.security.mscapi.RSACipher.engineInit(RSACipher.java:129)
  at javax.crypto.Cipher.init(DashoA13*..)
  at javax.crypto.Cipher.init(DashoA13*..)
  at com.sap.srm.crpto.client.applet.CryptoClass.main(CryptoClass.java:102)
  
  Published by: sabre150 on July 18, 2011 03:47
  
  Added [code] tags to make the code readable.

  A little research indicates the key classes gets by

                        RSAPubKey = c.getPublicKey();
                             RSAPrivKey = ks.getKey(aliasKey, null);  //"mypassword".toCharArray()
  

  are sun.security.rsa.RSAPublicKeyImpl and sun.security. * mscapi *. RSAPrivateKey. It seems that Cipher objects from the SunMSCAPI provider cannot accept class sun.security.rsa.RSAPublicKeyImpl RSA public keys and that the SunMSCAPI will accept only class sun.security.mscapi.RSAPrivateKey RSA private keys.

  This came in another form a couple of years. It makes sense because the packaging/encryption with a public key does not represent a security problem (there no secret in cryptographic operations) once done outside MSCAPI can use any provider who has the ability , BUT unpacking/decryption must be done with the SunMSCAPI provider which it delegates to the MSCAPI.

  My test code of work based on your code for implementation of this approach is:

          // RSA 1024 bits Asymmetric encryption of Symmetric AES key
          // List the certificates from Microsoft KeyStore using SunMSCAPI.
          System.out.println("List of certificates found in Microsoft Personal Keystore:");
  
          KeyStore ks = KeyStore.getInstance("Windows-MY", "SunMSCAPI");
          ks.load(null, null);
          Enumeration en = ks.aliases();
          PublicKey RSAPubKey = null;
          Key RSAPrivKey = null;
          int i = 0;
          while (en.hasMoreElements())
          {
              String aliasKey = (String) en.nextElement();
              X509Certificate c = (X509Certificate) ks.getCertificate(aliasKey);
              String sss = ks.getCertificateAlias(c);
              if (sss.equals("rsa_key")) // The alias for my key - make sure you change it back to your alias
              {
                  System.out.println("---> alias : " + sss);
                  i = i + 1;
                  String str = c.toString();
                  System.out.println(" Certificate details : " + str);
                  RSAPubKey = c.getPublicKey();
           System.out.println(RSAPubKey.getClass().getName());
                 RSAPrivKey = ks.getKey(aliasKey, null);  //"mypassword".toCharArray()
          System.out.println(RSAPrivKey.getClass().getName());
                  Certificate[] chain = ks.getCertificateChain(aliasKey);
              }
          }
          System.out.println(ks.getProvider().getName());
          System.out.println("No of certificates found from Personal MS Keystore: " + i);
          Cipher rsaCipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");//, ks.getProvider().getName());       !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
              rsaCipher.init(Cipher.WRAP_MODE, RSAPubKey);
          byte[] keyBytes =
          {
              1, 2, 3, 4, 5, 6, 7, 8, 2, 3, 4, 5, 6, 7, 8, 9
          };
          SecretKey aeskey = new SecretKeySpec(keyBytes, "AES");
          byte[] encryptedSymmKey = rsaCipher.wrap(aeskey);
          System.out.println("Encrypted Symmetric Key :" + Arrays.toString(encryptedSymmKey));
          System.out.println("Encrypted Symmetric Key Length in Bytes: " + encryptedSymmKey.length);
  
          // RSA Decryption of Encrypted Symmetric AES key
          Cipher unwrapRsaCipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", ks.getProvider().getName());       //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
          unwrapRsaCipher.init(Cipher.UNWRAP_MODE, RSAPrivKey);
          Key decryptedKey = unwrapRsaCipher.unwrap(encryptedSymmKey, "AES", Cipher.SECRET_KEY);
          System.out.println("Decrypted Symmetric Key :" + Arrays.toString(decryptedKey.getEncoded())); // Matches the 'keyBytes' above
  

• SL500 - upper and lower key

  Hi guys

  This may sound really stupid, but I need to use more and less than >.< (i="" found="" them="" in="">

  I press Shift + and I get;

  I press SHIFT +. and I get:

  is it possible to get these symbols I need for linux and a web programming

  Which is the combination to get these?

  Thank you very much

  What type of keyboard you are? US, UK, or another mode. To get your desired key combination, you must change your keyboard in US mode mode, you can do this in the Panel control, under regional and language icon.