Vulnerability Details CVE-2013-4206
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.011
EPSS Ranking 77.4%
CVSS Severity
CVSS v2 Score 6.8
References
- http://lists.opensuse.org/opensuse-updates/2013-08/msg00035.html
- http://secunia.com/advisories/54379
- http://secunia.com/advisories/54533
- http://svn.tartarus.org/sgt/putty/sshbn.c?sortby=date&r1=9977&r2=9976&pathrev=9977
- http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-modmul.html
- http://www.debian.org/security/2013/dsa-2736
- 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/54379
- http://secunia.com/advisories/54533
- http://svn.tartarus.org/sgt/putty/sshbn.c?sortby=date&r1=9977&r2=9976&pathrev=9977
- http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-modmul.html
- http://www.debian.org/security/2013/dsa-2736
- http://www.openwall.com/lists/oss-security/2013/08/06/11
Products affected by CVE-2013-4206
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cpe:2.3:a:putty:putty:0.45
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cpe:2.3:a:putty:putty:0.46
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cpe:2.3:a:putty:putty:0.47
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cpe:2.3:a:putty:putty:0.48
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cpe:2.3:a:putty:putty:0.49
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cpe:2.3:a:putty:putty:0.50
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cpe:2.3:a:putty:putty:0.51
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cpe:2.3:a:putty:putty:0.52
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cpe:2.3:a:putty:putty:0.53b
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cpe:2.3:a:putty:putty:0.54
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cpe:2.3:a:putty:putty:0.55
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cpe:2.3:a:putty:putty:0.56
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cpe:2.3:a:putty:putty:0.57
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cpe:2.3:a:putty:putty:0.58
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cpe:2.3:a:putty:putty:0.59
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cpe:2.3:a:putty:putty:0.60
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cpe:2.3:a:putty:putty:0.61
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cpe:2.3:a:putty:putty:2010-06-01
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cpe:2.3:a:simon_tatham:putty:-
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cpe:2.3:a:simon_tatham:putty:0.45
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cpe:2.3:a:simon_tatham:putty:0.46
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cpe:2.3:a:simon_tatham:putty:0.47
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cpe:2.3:a:simon_tatham:putty:0.48
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cpe:2.3:a:simon_tatham:putty:0.49
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cpe:2.3:a:simon_tatham:putty:0.50
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cpe:2.3:a:simon_tatham:putty:0.51
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cpe:2.3:a:simon_tatham:putty:0.52
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cpe:2.3:a:simon_tatham:putty:0.53
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cpe:2.3:a:simon_tatham:putty:0.53b
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cpe:2.3:a:simon_tatham:putty:0.54
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cpe:2.3:a:simon_tatham:putty:0.55
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cpe:2.3:a:simon_tatham:putty:0.56
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cpe:2.3:a:simon_tatham:putty:0.57
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cpe:2.3:a:simon_tatham:putty:0.58
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cpe:2.3:a:simon_tatham:putty:0.59
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cpe:2.3:a:simon_tatham:putty:0.60
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cpe:2.3:a:simon_tatham:putty:0.61
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cpe:2.3:a:simon_tatham:putty:0.62