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Vulnerability details: VCID-gzah-vjyt-aaad
Vulnerability ID VCID-gzah-vjyt-aaad
Aliases CVE-2013-4206
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
System Score Found at
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epss 0.01997 https://api.first.org/data/v1/epss?cve=CVE-2013-4206
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4852
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2013-4206
Reference id Reference type URL
http://lists.opensuse.org/opensuse-updates/2013-08/msg00035.html
https://api.first.org/data/v1/epss?cve=CVE-2013-4206
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4206
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4207
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4208
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4852
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
719070 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=719070
cpe:2.3:a:putty:putty:0.45:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:putty:putty:0.45:*:*:*:*:*:*:*
cpe:2.3:a:putty:putty:0.46:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:putty:putty:0.46:*:*:*:*:*:*:*
cpe:2.3:a:putty:putty:0.47:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:putty:putty:0.47:*:*:*:*:*:*:*
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cpe:2.3:a:simon_tatham:putty:0.53:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:simon_tatham:putty:0.53:*:*:*:*:*:*:*
CVE-2013-4206 https://nvd.nist.gov/vuln/detail/CVE-2013-4206
GLSA-201309-08 https://security.gentoo.org/glsa/201309-08
No exploits are available.
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2013-4206
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Exploit Prediction Scoring System (EPSS)
Percentile 0.76436
EPSS Score 0.01136
Published At March 28, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.