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.
Published: 2013-08-19
Score: 6.8 Medium
EPSS: 1.1% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-2736-1 putty security update
EUVD EUVD EUVD-2013-4111 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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2024-08-06T16:38:01.677Z

Reserved: 2013-06-12T00:00:00.000Z

Link: CVE-2013-4206

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2013-08-19T23:55:08.723

Modified: 2026-04-29T01:13:23.040

Link: CVE-2013-4206

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses