The do_uncompress function in g10/compress.c in GnuPG 1.x before 1.4.17 and 2.x before 2.0.24 allows context-dependent attackers to cause a denial of service (infinite loop) via malformed compressed packets, as demonstrated by an a3 01 5b ff byte sequence.

References

• https://nvd.nist.gov/vuln/detail/CVE-2014-4617
• http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=014b2103fcb12f261135e3954f26e9e07b39e342
• http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=11fdfcf82bd8d2b5bc38292a29876e10770f4b0a
• http://lists.gnupg.org/pipermail/gnupg-announce/2014q2/000344.html
• http://lists.gnupg.org/pipermail/gnupg-announce/2014q2/000345.html
• http://lists.opensuse.org/opensuse-updates/2014-07/msg00010.html
• http://secunia.com/advisories/59213
• http://secunia.com/advisories/59351
• http://secunia.com/advisories/59534
• http://secunia.com/advisories/59578
• http://www.debian.org/security/2014/dsa-2967
• http://www.debian.org/security/2014/dsa-2968
• http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
• http://www.ubuntu.com/usn/USN-2258-1