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CVE Database

CVE-2013-4207

Impact: Moderate
Public: 2013-07-15
Bugzilla: 993031: CVE-2013-4206 CVE-2013-4207 CVE-2013-4208 CVE-2013-4852 putty: Integer overflow, leading to heap-based buffer overflow during SSH handshake

Details

The MITRE CVE dictionary describes this issue as:

Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) via an invalid DSA signature that is not properly handled during computation of a modular inverse and triggers the overflow during a division by zero by the bignum functionality, a different vulnerability than CVE-2013-4206.

Find out more about CVE-2013-4207 from the MITRE CVE dictionary and NIST NVD.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score: 7.5
Base Metrics: AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector: Network
Access Complexity: Low
Authentication: None
Confidentiality Impact: Partial
Integrity Impact: Partial
Availability Impact: Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat security errata

Platform Errata Release Date

External References

This page is generated automatically and has not been checked for errors or omissions.

For clarification or corrections please contact the Red Hat Security Response Team.