How to resolve CVE-2014-0195 openssl: Buffer overflow via DTLS invalid fragment ?

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux (RHEL) 5 (OpenSSL).

  • Red Hat Enterprise Linux (RHEL) 6 (OpenSSL).

  • Red Hat Enterprise Linux 7 (OpenSSL).

  • Red Hat Storage Server 2.1 (OpenSSL).

Issue

The dtls1_reassemble_fragment function in d1_both.c in OpenSSL 
before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly validate fragment lengths in DTLS ClientHello messages,
which allows remote attackers to execute arbitrary code or cause a denial of service 
(buffer overflow and application crash) via a long non-initial fragment.

Resolution

  • This issue does not affect the version of openssl as shipped with Red Hat Enterprise Linux 5.

  • This issue does not affect the version of openssl098e as shipped with Red Hat Enterprise Linux 6.

  • Red Hat security errata for this vulnerability have been released as follow

  • Red Hat Enterprise Linux version 6 (openssl) via RHSA-2014:0625

  • Red Hat Enterprise Linux version 7 (openssl) via RHSA-2014:0679.

  • Red Hat Storage Server 2.1 (openssl) via RHSA-2014:0628.

Diagnostic Steps

External References

openssl
MITRE
NVD

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