Multiple heap-based buffer overflows in the modpow function in PuTTY before 0.55 allow (1) remote attackers to execute arbitrary code via an SSH2 packet with a base argument that is larger than the mod argument, which causes the modpow function to write memory before the beginning of its buffer, and (2) remote malicious servers to cause a denial of service (client crash) and possibly execute arbitrary code via a large bignum during authentication.
Advisories
Source ID Title
EUVD EUVD EUVD-2004-1437 Multiple heap-based buffer overflows in the modpow function in PuTTY before 0.55 allow (1) remote attackers to execute arbitrary code via an SSH2 packet with a base argument that is larger than the mod argument, which causes the modpow function to write memory before the beginning of its buffer, and (2) remote malicious servers to cause a denial of service (client crash) and possibly execute arbitrary code via a large bignum during authentication.
Fixes

Solution

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Workaround

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-08T00:53:23.781Z

Reserved: 2005-02-13T00:00:00

Link: CVE-2004-1440

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2004-12-31T05:00:00.000

Modified: 2025-04-03T01:03:51.193

Link: CVE-2004-1440

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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Weaknesses