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CVE-2017-12963

Published: 18 August 2017

There is an illegal address access in Sass::Eval::operator() in eval.cpp of LibSass 3.4.5, leading to a remote denial of service attack. NOTE: this is similar to CVE-2017-11555 but remains exploitable after the vendor's CVE-2017-11555 fix (available from GitHub after 2017-07-24).

Priority

Low

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
libsass
Launchpad, Ubuntu, Debian
impish Ignored
(end of life)
hirsute Ignored
(end of life)
groovy Ignored
(end of life)
jammy Needed

xenial Needed

kinetic Ignored
(end of life, was needed)
artful Ignored
(end of life)
bionic Needed

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Needed

trusty Does not exist

upstream Needed

zesty Ignored
(end of life)
mantic Needed

lunar Ignored
(end of life, was needed)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H