Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH
servers to cause a denial of service (crash) via an invalid DSA
signature that is not properly handled during computation of a modular
inverse and triggers the overflow during a division by zero by the
bignum functionality, a different vulnerability than CVE-2013-4206.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MLIST:[oss-security] 20130806 CVE request: three additional flaws fixed in putty 0.63
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