What’s Vulnerable › Vulnerabilities

CVE-2015-5309

• Severity: medium (CVSS 4.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2015-12-07 · updated 2026-06-17
• Weakness: CWE-189

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

• openSUSE Leap: 42.1
• Opensuse: 13.1, 13.2
• Simon Tatham Putty: through 0.65

References

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

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