Unrated severityNVD Advisory· Published Aug 19, 2013· Updated Jun 16, 2026
CVE-2013-4207
CVE-2013-4207
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
22cpe:2.3:a:putty:putty:0.45:*:*:*:*:*:*:*+ 20 more
- cpe:2.3:a:putty:putty:0.45:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:0.46:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:0.47:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:0.48:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:0.49:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:0.50:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:0.51:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:0.52:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:0.53b:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:0.54:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:0.55:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:0.56:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:0.57:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:0.58:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:0.59:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:0.60:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:0.61:*:*:*:*:*:*:*
- cpe:2.3:a:putty:putty:2010-06-01:r8967:*:*:development_snapshot:*:*:*
- cpe:2.3:a:simon_tatham:putty:*:*:*:*:*:*:*:*range: <=0.62
- cpe:2.3:a:simon_tatham:putty:0.53:*:*:*:*:*:*:*
- (no CPE)range: <0.63
Patches
Vulnerability mechanics
References
6- secunia.com/advisories/54379nvdVendor Advisory
- www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-bignum-division-by-zero.htmlnvdVendor Advisory
- lists.opensuse.org/opensuse-updates/2013-08/msg00035.htmlnvd
- secunia.com/advisories/54533nvd
- www.debian.org/security/2013/dsa-2736nvd
- www.openwall.com/lists/oss-security/2013/08/06/11nvd
News mentions
0No linked articles in our index yet.