CVE-2013-4206

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Summary

CVECVE-2013-4206
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2013-08-19 23:55:08 UTC
Updated2026-04-29 01:13:23 UTC
DescriptionHeap-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.

Risk And Classification

Primary CVSS: v2.0 6.8 from [email protected]

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

Problem Types: CWE-119 | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Putty Putty 0.45 All All All
Application Putty Putty 0.46 All All All
Application Putty Putty 0.47 All All All
Application Putty Putty 0.48 All All All
Application Putty Putty 0.49 All All All
Application Putty Putty 0.50 All All All
Application Putty Putty 0.51 All All All
Application Putty Putty 0.52 All All All
Application Putty Putty 0.53b All All All
Application Putty Putty 0.54 All All All
Application Putty Putty 0.55 All All All
Application Putty Putty 0.56 All All All
Application Putty Putty 0.57 All All All
Application Putty Putty 0.58 All All All
Application Putty Putty 0.59 All All All
Application Putty Putty 0.60 All All All
Application Putty Putty 0.61 All All All
Application Putty Putty 2010-06-01 r8967 All All
Application Simon Tatham Putty 0.53 All All All
Application Simon Tatham Putty All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
openSUSE-SU-2013:1347-1: moderate: filezilla: 3.7.3 version and security af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
Security Advisory SA54379 - Debian update for putty - Secunia af854a3a-2127-422b-91ae-364da2661108 secunia.com Vendor Advisory
About Secunia Research | Flexera af854a3a-2127-422b-91ae-364da2661108 secunia.com
oss-security - CVE request: three additional flaws fixed in putty 0.63 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
svn.tartarus.org/sgt/putty/sshbn.c af854a3a-2127-422b-91ae-364da2661108 svn.tartarus.org Patch
PuTTY vulnerability vuln-modmul af854a3a-2127-422b-91ae-364da2661108 www.chiark.greenend.org.uk Vendor Advisory
Debian -- Security Information -- DSA-2736-1 putty af854a3a-2127-422b-91ae-364da2661108 www.debian.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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