CVE-2013-4206
Medium
Description
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.
SeverityMedium
CVSS6.8
Exploit probability—
ProductPutty
PublishedAug 19, 2013
First seenAug 19, 2013
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| putty putty | 0.45, 0.46, 0.47, 0.48, 0.49, 0.50, 0.51, 0.52, 0.53b, 0.54, 0.55, 0.56, 0.57, 0.58, 0.59, 0.60, 0.61, 2010-06-01 | — |
| simon_tatham putty | v ≤ 0.62, 0.53 | — |
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