Unrated severityNVD Advisory· Published Dec 7, 2015· Updated May 6, 2026

CVE-2015-5309

Description

Integer overflow in the terminal emulator in PuTTY before 0.66 allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via an ECH (erase characters) escape sequence with a large parameter value, which triggers a buffer underflow.

Affected products

Putty/Putty
cpe:2.3:a:simon_tatham:putty:*:*:*:*:*:*:*:*
Range: <=0.65
OpenSUSE/Leap
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
OpenSUSE/openSUSE2 versions
cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-ech-overflow.htmlnvdVendor Advisory
lists.fedoraproject.org/pipermail/package-announce/2015-December/173021.htmlnvd
lists.fedoraproject.org/pipermail/package-announce/2015-December/173094.htmlnvd
lists.opensuse.org/opensuse-updates/2015-11/msg00099.htmlnvd
www.debian.org/security/2015/dsa-3409nvd
www.securitytracker.com/id/1034308nvd
security.gentoo.org/glsa/201606-01nvd

News mentions

No linked articles in our index yet.

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epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000