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CVE-2013-4206

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

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6.8
Vector
AV:N/AC:M/Au:N/C:P/I:P/A:P
Exploitability: 8.6 / Impact: 6.4
Source: NVD

Description

Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) and possibly trigger memory corruption or code execution via a crafted DSA signature, which is not properly handled when performing certain bit-shifting operations during modular multiplication.

Affected (20)

Products: Putty: Putty · Simon Tatham: Putty
Putty
1 product
Putty
Simon Tatham
1 product
Putty
Configuration A
20 vulnerable
Vulnerable SoftwareAffected Versions
Putty
Putty
Version 0.45
Putty
Version 0.46
Putty
Version 0.47
Putty
Version 0.48
Putty
Version 0.49
Putty
Version 0.50
Putty
Version 0.51
Putty
Version 0.52
Putty
Version 0.53b
Putty
Version 0.54
Putty
Version 0.55
Putty
Version 0.56
Putty
Version 0.57
Putty
Version 0.58
Putty
Version 0.59
Putty
Version 0.60
Putty
Version 0.61
Putty
Version 2010-06-01 r8967
Simon Tatham
Putty
Up to 0.62
Putty
Version 0.53

Related CWEs

CWE-119
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 (14)

Source: secalert@redhat.com
Source: secalert@redhat.com
Vendor Advisory
Source: secalert@redhat.com
Source: secalert@redhat.com
Patch
Source: secalert@redhat.com
Vendor Advisory
Source: secalert@redhat.com
Source: secalert@redhat.com
Source: af854a3a-2127-422b-91ae-364da2661108
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Source: af854a3a-2127-422b-91ae-364da2661108
Patch
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.