medium
4.3
Advisory Published
CVE Published
Updated

CVE-2014-3511

First published: Thu Aug 07 2014(Updated: )

By pathologically modifying a clients ClientHello message with fragmentation, it's possible to cause the server to negotiate TLS 1.0 instead of a higher version, even if both client and server support a higher protocol version.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/openssl<1.0.1
1.0.1
OpenSSL=1.0.0
OpenSSL=1.0.0-beta1
OpenSSL=1.0.0-beta2
OpenSSL=1.0.0-beta3
OpenSSL=1.0.0-beta4
OpenSSL=1.0.0-beta5
OpenSSL=1.0.0a
OpenSSL=1.0.0b
OpenSSL=1.0.0c
OpenSSL=1.0.0d
OpenSSL=1.0.0e
OpenSSL=1.0.0f
OpenSSL=1.0.0g
OpenSSL=1.0.0h
OpenSSL=1.0.0i
OpenSSL=1.0.0j
OpenSSL=1.0.0k
OpenSSL=1.0.0l
OpenSSL=1.0.0m
OpenSSL=1.0.1
OpenSSL=1.0.1-beta1
OpenSSL=1.0.1-beta2
OpenSSL=1.0.1-beta3
OpenSSL=1.0.1a
OpenSSL=1.0.1b
OpenSSL=1.0.1c
OpenSSL=1.0.1d
OpenSSL=1.0.1e
OpenSSL=1.0.1f
OpenSSL=1.0.1g
OpenSSL=1.0.1h

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2014-3511?

    CVE-2014-3511 is considered to have moderate severity due to its impact on TLS negotiation.

  • How do I fix CVE-2014-3511?

    To fix CVE-2014-3511, upgrade OpenSSL to a version later than 1.0.1.

  • What versions of OpenSSL are affected by CVE-2014-3511?

    CVE-2014-3511 affects OpenSSL versions 1.0.0 through 1.0.1 inclusive.

  • What type of attack does CVE-2014-3511 involve?

    CVE-2014-3511 involves a manipulation of the ClientHello message which can lead to a downgrade in the expected TLS version.

  • Is CVE-2014-3511 a client-side or server-side vulnerability?

    CVE-2014-3511 is primarily a server-side vulnerability affecting the handling of ClientHello messages.

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