CVE-2013-4852 Information

Description

Integer overflow in PuTTY 0.62 and earlier WinSCP before 5.1.6 and other products that use PuTTY allows remote SSH servers to cause a denial of service (crash) and possibly execute arbitrary code in certain applications that use PuTTY via a negative size value in an RSA key signature during the SSH handshake which triggers a heap-based buffer overflow.

Reference

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=718779 http://lists.opensuse.org/opensuse-updates/2013-08/msg00035.html http://lists.opensuse.org/opensuse-updates/2013-08/msg00041.html http://secunia.com/advisories/54379 http://secunia.com/advisories/54517 http://secunia.com/advisories/54533 http://svn.tartarus.org/sgt?view=revision&sortby=date&revision=9896 http://winscp.net/tracker/show_bug.cgi?id=1017 http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-signature-stringlen.html http://www.debian.org/security/2013/dsa-2736 http://www.search-lab.hu/advisories/secadv-20130722