CVE-2015-0291

Name: CVE-2015-0291
Creator: NVD / NIST
Published: 2015-03-19T22:59:09.66+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 8.11%

Last modified Jun 17, 2026

CVE-2015-0291 is a vulnerability of currently unknown severity. The sigalgs implementation in t1_lib.c in OpenSSL 1.0.2 before 1.0.2a allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) by using an invalid signature_algorithms extension in the ClientHello message during a renegotiation.. EPSS estimates a 8.11% chance of exploitation in the next 30 days.

Description

The sigalgs implementation in t1_lib.c in OpenSSL 1.0.2 before 1.0.2a allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) by using an invalid signature_algorithms extension in the ClientHello message during a renegotiation.

Metrics

EPSS Probability

8.11%

94.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Openssl	Openssl	1.0.2

References

http://marc.info/?l=bugtraq&m=143748090628601&w=2Mailing List, Third Party Advisory
http://marc.info/?l=bugtraq&m=144050155601375&w=2Mailing List, Third Party Advisory
http://marc.info/?l=bugtraq&m=144050297101809&w=2Mailing List, Third Party Advisory
http://www.fortiguard.com/advisory/2015-03-24-openssl-vulnerabilities-march-2015Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlPatch, Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.htmlThird Party Advisory
http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.htmlThird Party Advisory
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.htmlThird Party Advisory
http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.htmlThird Party Advisory
http://www.securityfocus.com/bid/73235Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1031929Third Party Advisory, VDB Entry
https://bto.bluecoat.com/security-advisory/sa92Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1202338Issue Tracking
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=76343947ada960b6269090638f5391068daee88d
https://kc.mcafee.com/corporate/index?page=content&id=SB10110Third Party Advisory
https://security.gentoo.org/glsa/201503-11Third Party Advisory
https://www.openssl.org/news/secadv_20150319.txtVendor Advisory
http://marc.info/?l=bugtraq&m=143748090628601&w=2Mailing List, Third Party Advisory
http://marc.info/?l=bugtraq&m=144050155601375&w=2Mailing List, Third Party Advisory
http://marc.info/?l=bugtraq&m=144050297101809&w=2Mailing List, Third Party Advisory
http://www.fortiguard.com/advisory/2015-03-24-openssl-vulnerabilities-march-2015Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlPatch, Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.htmlThird Party Advisory
http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.htmlThird Party Advisory
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.htmlThird Party Advisory
http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.htmlThird Party Advisory
http://www.securityfocus.com/bid/73235Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1031929Third Party Advisory, VDB Entry
https://bto.bluecoat.com/security-advisory/sa92Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1202338Issue Tracking
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=76343947ada960b6269090638f5391068daee88d
https://kc.mcafee.com/corporate/index?page=content&id=SB10110Third Party Advisory
https://security.gentoo.org/glsa/201503-11Third Party Advisory
https://www.openssl.org/news/secadv_20150319.txtVendor Advisory

Timeline

Published: Mar 19, 2015
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-0291?

How severe is CVE-2015-0291?

Severity scoring for CVE-2015-0291 is pending analysis. The EPSS model estimates a 8.11% probability of exploitation in the next 30 days.

How do I fix CVE-2015-0291?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-0291?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST