Vulnerability DatabaseCVE-2015-5309
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CVE-2015-5309
Published:December 07, 2015
Updated:May 17, 2026
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.
Related Resources (9)
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-ech-overflow.html
http://www.debian.org/security/2015/dsa-3409
https://people.canonical.com/~ubuntu-security/cve/CVE-2015-5309
https://security.gentoo.org/glsa/201606-01
http://lists.fedoraproject.org/pipermail/package-announce/2015-December/173094.html
http://lists.opensuse.org/opensuse-updates/2015-11/msg00099.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-December/173021.html
https://security-tracker.debian.org/tracker/CVE-2015-5309
http://www.securitytracker.com/id/1034308
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CVSS v3
Base Score:
3.7
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
CVSS v2
Base Score:
4.3
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
EPSS
Base Score:
1.74