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CVE-2015-7758

Published: 8 January 2016

Gummi 0.6.5 allows local users to write to arbitrary files via a symlink attack on a temporary dot file that uses the name of an existing file and a (1) .aux, (2) .log, (3) .out, (4) .pdf, or (5) .toc extension for the file name, as demonstrated by .thesis.tex.aux.

From the Ubuntu Security Team

It was discovered that Gummi created unsafe, predictable filenames in /tmp, resulting in a race condition. An attacker could use this vulnerability to overwrite arbitrary files.

Priority

Low

Cvss 3 Severity Score

3.3

Score breakdown

Status

Package Release Status
gummi
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic Not vulnerable
(0.6.6-4)
cosmic Not vulnerable
(0.6.6-5)
precise Ignored
(end of life)
trusty
Released (0.6.5-3+deb8u2build0.14.04.1)
upstream
Released (0.6.5-2+deb8u1)
vivid Ignored
(end of life)
wily Ignored
(end of life)
xenial Not vulnerable
(0.6.6-1)
yakkety Ignored
(end of life)
zesty Ignored
(end of life)
This vulnerability is mitigated in part by the use of hardlink restrictions in Ubuntu. This vulnerability is mitigated in part by the use of symlink restrictions in Ubuntu.

Severity score breakdown

Parameter Value
Base score 3.3
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact Low
Availability impact None
Vector CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N