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CVE-2013-6449

25
FAUCET Score

CVE-2013-6449 describes a denial-of-service vulnerability in OpenSSL versions prior to 1.0.2, specifically within the ssl_get_algorithm2 function. A remote attacker can exploit this by sending crafted TLS 1.2 client traffic, causing the daemon to crash. The vulnerability has a CVSS score of 4.3, indicating a medium attack complexity and a partial availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.0.1eCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.0:*:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.0:beta1:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.0:beta2:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.0:beta3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
21.17%
Probability of exploitation in next 30 days
EPSS Percentile
97.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.2117 is in the 98th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: openssl-0:1.0.1e-16.el6_5.4
View patch
redhatpatch availablevia redhat_api
Product: RHEV 3.X Hypervisor and Agents for RHEL-6Fixed in: rhev-hypervisor6-0:6.5-20140112.0.el6ev
View patch
wagopatch availablevia llm_extracted
Fixed in: ['8.0.7']

Vendor Advisories (2)

redhatCVE-2013-6449Important

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

Dec 19, 2013
wagollm-wago-08b8a4a34317d78fHIGH

Upgrade to OpenSSL 1.0.1f

References

git.openssl.org / gitweb
lists.fedoraproject.org / pipermail/package-announce/2013-December/124833.html
lists.fedoraproject.org / pipermail/package-announce/2013-December/124854.html
lists.fedoraproject.org / pipermail/package-announce/2013-December/124858.html
lists.fedoraproject.org / pipermail/package-announce/2014-August/136470.html
lists.fedoraproject.org / pipermail/package-announce/2014-August/136473.html
lists.opensuse.org / opensuse-updates/2014-01/msg00006.html
lists.opensuse.org / opensuse-updates/2014-01/msg00009.html
lists.opensuse.org / opensuse-updates/2014-01/msg00012.html
lists.opensuse.org / opensuse-updates/2014-01/msg00031.html
rhn.redhat.com / errata/RHSA-2014-0015.html
rhn.redhat.com / errata/RHSA-2014-0041.html
rt.openssl.org / Ticket/Display.html
bugzilla.redhat.com / show_bug.cgi
seclists.org / fulldisclosure/2014/Dec/23
security.gentoo.org / glsa/glsa-201412-39.xml
issues.apache.org / jira/browse/TS-2355
www-01.ibm.com / support/docview.wss
www-01.ibm.com / support/docview.wss
debian.org / security/2014/dsa-2833
oracle.com / technetwork/topics/security/cpujan2015-1972971.html
oracle.com / technetwork/topics/security/cpujul2014-1972956.html
securityfocus.com / archive/1/534161/100/0/threaded
securityfocus.com / bid/64530
securitytracker.com / id/1029548
ubuntu.com / usn/USN-2079-1
vmware.com / security/advisories/VMSA-2014-0012.html