CVE-2013-6449
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 21.2%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 2.0
- 4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:N/A:P
- EPSS
- 21.17% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-310
- Affected
- openssl/openssl
- Source
- secalert@redhat.com
EPSS 21.2% since 4 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://git.openssl.org/gitweb/?p=openssl.git%3Ba=commit%3Bh=ca989269a2876bae79393bd54c3e72d49975fc75
- http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124833.html
- http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124854.html
- http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124858.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136470.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136473.html
- http://lists.opensuse.org/opensuse-updates/2014-01/msg00006.html
- http://lists.opensuse.org/opensuse-updates/2014-01/msg00009.html
- http://lists.opensuse.org/opensuse-updates/2014-01/msg00012.html
- http://lists.opensuse.org/opensuse-updates/2014-01/msg00031.html
- http://rhn.redhat.com/errata/RHSA-2014-0015.html
- http://rhn.redhat.com/errata/RHSA-2014-0041.html
- http://rt.openssl.org/Ticket/Display.html?id=3200&user=guest&pass=guest
- http://seclists.org/fulldisclosure/2014/Dec/23
- http://security.gentoo.org/glsa/glsa-201412-39.xml
- http://www-01.ibm.com/support/docview.wss?uid=isg400001841
- http://www-01.ibm.com/support/docview.wss?uid=isg400001843
- http://www.debian.org/security/2014/dsa-2833
- http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
- http://www.oracle.com/technetwork/topics/security/cpujul2014-1972956.html
- http://www.securityfocus.com/archive/1/534161/100/0/threaded
- http://www.securityfocus.com/bid/64530
- http://www.securitytracker.com/id/1029548
- http://www.ubuntu.com/usn/USN-2079-1
- http://www.vmware.com/security/advisories/VMSA-2014-0012.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1045363
- https://issues.apache.org/jira/browse/TS-2355
- http://git.openssl.org/gitweb/?p=openssl.git%3Ba=commit%3Bh=ca989269a2876bae79393bd54c3e72d49975fc75
- http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124833.html
- http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124854.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.