CVE-2017-1000083

Publication date 13 July 2017

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

backend/comics/comics-document.c (aka the comic book backend) in GNOME Evince before 3.24.1 allows remote attackers to execute arbitrary commands via a .cbt file that is a TAR archive containing a filename beginning with a "--" command-line option substring, as demonstrated by a --checkpoint-action=exec=bash at the beginning of the filename.

From the Ubuntu Security Team

Felix Wilhelm discovered that Evince did not safely invoke tar when handling tar comic book (cbt) files. An attacker could use this to construct a malicious comic book format file that, when opened in Evince, executes arbitrary code.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
atril	17.10 artful	Not affected
	17.04 zesty	Ignored end of life
	16.10 yakkety	Ignored end of life
	16.04 LTS xenial	Fixed 1.12.2-1ubuntu0.2
	14.04 LTS trusty	Not in release
evince	17.10 artful	Not affected
	17.04 zesty	Fixed 3.24.0-0ubuntu1.1
	16.10 yakkety	Fixed 3.22.0-0ubuntu1.1
	16.04 LTS xenial	Fixed 3.18.2-1ubuntu4.1
	14.04 LTS trusty	Fixed 3.10.3-0ubuntu10.3

Notes

sbeattie

upstream evince in git has switched to using libarchive The fix for this issue disables CBT support, as tar offers to many opportunities to invoke commands and CBT is a rarely used comic book format.

Severity score breakdown

Parameter	Value
Base score	7.8 · High
Attack vector	Local
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H