CVE-2013-4206 - CVE House
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Status published Medium CVE-2013-4206

Heap-based buffer underflow in the modmul function in sshbn.c in...

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

putty
Vulnerable Versions:
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, 0, 0.53

Timeline

Official Publish: August 19th, 2013
Last Modified: August 6th, 2024
Added to House: July 19th, 2026

CVSS Vectors

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.