CVE-2013-4207

Published: Aug 19, 2013Modified: Apr 29, 2026

4.3

Vector

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

Exploitability: 8.6 / Impact: 2.9

Source: NVD

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.

Affected (20)

Products: Putty: Putty · Simon Tatham: Putty

1 product

1 product

Configuration A

20 vulnerable

Vulnerable Software	Affected Versions
Putty Putty	Version 0.45
Putty Putty	Version 0.46
Putty Putty	Version 0.47
Putty Putty	Version 0.48
Putty Putty	Version 0.49
Putty Putty	Version 0.50
Putty Putty	Version 0.51
Putty Putty	Version 0.52
Putty Putty	Version 0.53b
Putty Putty	Version 0.54
Putty Putty	Version 0.55
Putty Putty	Version 0.56
Putty Putty	Version 0.57
Putty Putty	Version 0.58
Putty Putty	Version 0.59
Putty Putty	Version 0.60
Putty Putty	Version 0.61
Putty Putty	Version 2010-06-01 r8967
Simon Tatham Putty	Up to 0.62
Simon Tatham Putty	Version 0.53

Related CWEs

Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

References (12)

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

Source: secalert@redhat.com

http://secunia.com/advisories/54379

Source: secalert@redhat.com

Vendor Advisory

http://secunia.com/advisories/54533

Source: secalert@redhat.com

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

Source: secalert@redhat.com

Vendor Advisory

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

Source: secalert@redhat.com

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

Source: secalert@redhat.com

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

Source: af854a3a-2127-422b-91ae-364da2661108

http://secunia.com/advisories/54379

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

http://secunia.com/advisories/54533

Source: af854a3a-2127-422b-91ae-364da2661108

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

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

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

Source: af854a3a-2127-422b-91ae-364da2661108

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

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.