The __driver_rfc4106_decrypt function in arch/x86/crypto/aesni-intel_glue.c in the Linux kernel before 3.19.3 does not properly determine the memory locations used for encrypted data, which allows context-dependent attackers to cause a denial of service (buffer overflow and system crash) or possibly execute arbitrary code by triggering a crypto API call, as demonstrated by use of a libkcapi test program with an AF_ALG(aead) socket.

References

• https://nvd.nist.gov/vuln/detail/CVE-2015-3331
• torvalds/linux@ccfe8c3
• https://bugzilla.redhat.com/show_bug.cgi?id=1213322
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ccfe8c3f7e52ae83155cb038753f4c75b774ca8a
• http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00004.html
• http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00007.html
• http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00008.html
• http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00009.html
• http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00011.html
• http://rhn.redhat.com/errata/RHSA-2015-1081.html
• http://rhn.redhat.com/errata/RHSA-2015-1199.html
• http://www.debian.org/security/2015/dsa-3237
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.19.3
• http://www.openwall.com/lists/oss-security/2015/04/14/16
• http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
• http://www.securitytracker.com/id/1032416
• http://www.ubuntu.com/usn/USN-2631-1
• http://www.ubuntu.com/usn/USN-2632-1
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ccfe8c3f7e52ae83155cb038753f4c75b774ca8a