DescriptionHeap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) and possibly trigger memory corruption or code execution via a crafted DSA signature, which is not properly handled when performing certain bit-shifting operations during modular multiplication.
NVD CVSS v2 Base Score: 6.8 (AV:N/AC:M/Au:N/C:P/I:P/A:P)
Novell/SUSE informationNo Novell Bugzilla entries cross referenced. SUSE Security Advisories:
- openSUSE-SU-2013:1347-1, published Fri, 16 Aug 2013 15:04:12 +0200 (CEST)