CVE-2018-1000156 Information

Description

GNU Patch version 2.7.6 contains an input validation vulnerability when processing patch files specifically the EDITOR_PROGRAM invocation (using ed) can result in code execution. This attack appear to be exploitable via a patch file processed via the patch utility. This is similar to FreeBSD’s CVE-2015-1418 however although they share a common ancestry the code bases have diverged over time.

CVSS Vector

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

Reference

http://packetstormsecurity.com/files/154124/GNU-patch-Command-Injection-Directory-Traversal.html http://rachelbythebay.com/w/2018/04/05/bangpatch/ https://access.redhat.com/errata/RHSA-2018:1199 https://access.redhat.com/errata/RHSA-2018:1200 https://access.redhat.com/errata/RHSA-2018:2091 https://access.redhat.com/errata/RHSA-2018:2092 https://access.redhat.com/errata/RHSA-2018:2093 https://access.redhat.com/errata/RHSA-2018:2094 https://access.redhat.com/errata/RHSA-2018:2095 https://access.redhat.com/errata/RHSA-2018:2096 https://access.redhat.com/errata/RHSA-2018:2097 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=89466719 https://lists.debian.org/debian-lts-announce/2018/04/msg00013.html https://savannah.gnu.org/bugs/index.php?53566 https://seclists.org/bugtraq/2019/Aug/29 https://seclists.org/bugtraq/2019/Jul/54 https://security.gentoo.org/glsa/201904-17 https://twitter.com/kurtseifried/status/982028968877436928 https://usn.ubuntu.com/3624-1/ https://usn.ubuntu.com/3624-2/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8