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.
Max CVSS
6.8
EPSS Score
1.48%
Published
2013-08-19
Updated
2021-08-06
1 vulnerabilities found
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