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Fencer Intel
medium 4.3

CVE-2013-6449 json

The ssl_get_algorithm2 function in ssl/s3_lib.c in OpenSSL before 1.0.2 obtains a certain version number from an incorrect data structure,…

published 12y ago modified 4mo ago also EUVD-2013-6256

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
21.2%
EPSS 21.2% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

The ssl_get_algorithm2 function in ssl/s3_lib.c in OpenSSL before 1.0.2 obtains a certain version number from an incorrect data structure, which allows remote attackers to cause a denial of service (daemon crash) via crafted traffic from a TLS 1.2 client.

Patch / fix

  • openssl Debian 14, Debian 13, Debian 12 1.0.1e-5

debian advisories DEBIAN-CVE-2013-6449

  • openssl RHEL 6 1.0.1e-16.el6_5.4
  • openssl-perl RHEL 6 1.0.1e-16.el6_5.4
  • rhev-hypervisor6 RHEL 6 6.5-20140112.0.el6ev

red hat advisories RHSA-2014:0015RHSA-2014:0041

  • openssl-1_1 openSUSE Tumbleweed 1.1.1l-1.2

opensuse advisories openSUSE-SU-2024:11127-1

Is CVE-2013-6449 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2013-6449 updated cvss 5.0

openssl: crash when using TLS 1.2 caused by use of incorrect hash algorithm

  • Red Hat Enterprise Linux Desktop (v. 6) openssl 1.0.1e-16.el6_5.4 Red Hat Enterprise Linux Desktop Optional (v. 6) openssl 1.0.1e-16.el6_5.4, openssl-perl 1.0.1e-16.el6_5.4 Red Hat Enterprise Linux HPC Node (v. 6) openssl 1.0.1e-16.el6_5.4 Red Hat Enterprise Linux HPC Node Optional (v. 6) openssl 1.0.1e-16.el6_5.4, openssl-perl 1.0.1e-16.el6_5.4 Red Hat Enterprise Linux Server (v. 6) openssl 1.0.1e-16.el6_5.4 Red Hat Enterprise Linux Server Optional (v. 6) openssl 1.0.1e-16.el6_5.4, openssl-perl 1.0.1e-16.el6_5.4
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 6) openssl 1.0.1e-16.el6_5.4 Red Hat Enterprise Linux Workstation Optional (v. 6) openssl 1.0.1e-16.el6_5.4, openssl-perl 1.0.1e-16.el6_5.4
    fixed: vendor fix RHSA-2014:0015
  • Red Hat RHEV Hypervisor for RHEL-6 rhev-hypervisor6 6.5-20140112.0.el6ev
    fixed: vendor fix RHSA-2014:0041
  • Red Hat Enterprise Linux 4 openssl Red Hat Enterprise Linux 5 openssl, openssl097a Red Hat Enterprise Linux 6 openssl098e Red Hat Enterprise Linux 7 openssl, openssl098e, openssl-libs, openssl-perl Red Hat JBoss Enterprise Application Platform 5 openssl Red Hat JBoss Enterprise Application Platform 6 openssl
    +2 more products
    Red Hat JBoss Enterprise Web Server 1 openssl Red Hat JBoss Enterprise Web Server 2 openssl
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

21.17% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.