The hash_buffer function in schnorr.c in OpenSSH through 6.4, when Makefile.inc is modified to enable the J-PAKE protocol, does not initialize certain data structures, which might allow remote attackers to cause a denial of service (memory corruption) or have unspecified other impact via vectors that trigger an error condition.

References

• https://nvd.nist.gov/vuln/detail/CVE-2014-1692
• https://exchange.xforce.ibmcloud.com/vulnerabilities/90819
• http://marc.info/?l=bugtraq&m=141576985122836&w=2
• http://marc.info/?l=bugtraq&m=144050155601375&w=2
• http://openwall.com/lists/oss-security/2014/01/29/10
• http://openwall.com/lists/oss-security/2014/01/29/2
• http://osvdb.org/102611
• http://secunia.com/advisories/60184
• http://www-01.ibm.com/support/docview.wss?uid=isg3T1020637
• http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/Attic/schnorr.c.diff?r1=1.9;r2=1.10;f=h
• http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/schnorr.c#rev1.10
• http://www.securityfocus.com/bid/65230
• http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/Attic/schnorr.c.diff?r1=1.9%3Br2=1.10%3Bf=h