CVE-2013-4207

medium

Description

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.

References

http://secunia.com/advisories/54379

http://www.debian.org/security/2013/dsa-2736

http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-bignum-division-by-zero.html

http://www.openwall.com/lists/oss-security/2013/08/06/11

http://lists.opensuse.org/opensuse-updates/2013-08/msg00035.html

http://secunia.com/advisories/54533

Details

Source: MITRE

Published: 2013-08-19

Updated: 2021-08-06

Type: CWE-119

Risk Information

CVSS v2

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM