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CVE-2013-4206

Published: 19 August 2013

Heap-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.

Priority

Medium

Status

Package Release Status
putty
Launchpad, Ubuntu, Debian
lucid Ignored
(end of life)
precise
Released (0.62-6ubuntu0.1)
quantal
Released (0.62-9ubuntu0.1)
raring
Released (0.62-10ubuntu0.1)
upstream
Released (0.63)