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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2015-0291
• https://bto.bluecoat.com/security-advisory/sa92
• https://bugzilla.redhat.com/show_bug.cgi?id=1202338
• https://git.openssl.org/?p=openssl.git;a=commit;h=76343947ada960b6269090638f5391068daee88d
• https://kc.mcafee.com/corporate/index?page=content&id=SB10110
• https://security.gentoo.org/glsa/201503-11
• https://www.openssl.org/news/secadv_20150319.txt
• http://marc.info/?l=bugtraq&m=143748090628601&w=2
• http://marc.info/?l=bugtraq&m=144050155601375&w=2
• http://marc.info/?l=bugtraq&m=144050297101809&w=2
• http://www.fortiguard.com/advisory/2015-03-24-openssl-vulnerabilities-march-2015
• http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
• http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
• http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
• http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
• http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
• http://www.securityfocus.com/bid/73235
• http://www.securitytracker.com/id/1031929
• https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf