CVE-2015-5309

critical

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.

References

https://security.gentoo.org/glsa/201606-01

http://www.securitytracker.com/id/1034308

http://www.debian.org/security/2015/dsa-3409

http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-ech-overflow.html

http://lists.opensuse.org/opensuse-updates/2015-11/msg00099.html

http://lists.fedoraproject.org/pipermail/package-announce/2015-December/173094.html

http://lists.fedoraproject.org/pipermail/package-announce/2015-December/173021.html

Details

Source: Mitre, NVD

Published: 2015-12-07

Updated: 2018-10-30

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical