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PRIOn knowledge basePRION:CVE-2013-4206HistoryAug 19, 2013 - 11:55 p.m.
Heap overflow
2013-08-1923:55:00
PRIOn knowledge base
www.prio-n.com
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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.
References
lists.opensuse.org/opensuse-updates/2013-08/msg00035.html
secunia.com/advisories/54379
secunia.com/advisories/54533
svn.tartarus.org/sgt/putty/sshbn.c?sortby=date&r1=9977&r2=9976&pathrev=9977
www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-modmul.html
www.debian.org/security/2013/dsa-2736
www.openwall.com/lists/oss-security/2013/08/06/11
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