CVE-2018-20969

high

Description

do_ed_script in pch.c in GNU patch through 2.7.6 does not block strings beginning with a ! character. NOTE: this is the same commit as for CVE-2019-13638, but the ! syntax is specific to ed, and is unrelated to a shell metacharacter.

References

Advisories
More

https://access.redhat.com/errata/RHSA-2019:4061

https://access.redhat.com/errata/RHSA-2019:3758

https://access.redhat.com/errata/RHSA-2019:3757

https://access.redhat.com/errata/RHSA-2019:2964

https://access.redhat.com/errata/RHSA-2019:2798

http://packetstormsecurity.com/files/154124/GNU-patch-Command-Injection-Directory-Traversal.html

https://seclists.org/bugtraq/2019/Aug/29

https://github.com/irsl/gnu-patch-vulnerabilities

https://git.savannah.gnu.org/cgit/patch.git/commit/?id=3fcd042d26d70856e826a42b5f93dc4854d80bf0

Details

Source: Mitre, NVD

Published: 2019-08-16

Updated: 2019-09-05

Risk Information

CVSS v2

Base Score: 9.3

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

Severity: High

CVSS v3

Base Score: 7.8

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