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Vulnerability record · CVE-2015-5309 · published 7 December 2015

CVE-2015-5309: Opensuse leap vulnerability

Opensuse · Leap

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.

4.3 CVSS 2.0 Medium EPSS 3.5% · top 11.4% CWE-189 · CWE-189
4.3CVSS 2.0 base score
3.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

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.

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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 Vendor Advisory
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 Vendor Advisory
http://www.debian.org/security/2015/dsa-3409
http://www.securitytracker.com/id/1034308
https://security.gentoo.org/glsa/201606-01

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Source: NIST National Vulnerability Database (record CVE-2015-5309), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.