CVE-2018-20969

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.

CVSS v3.0 NVD

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

CVSS v2.0 NVD

9.3 HIGHAV:N/AC:M/Au:N/C:C/I:C/A:C

EPSS

2.68% chance of exploitation in the next 30 days, 86th percentile

Published

2019-08-16

Updated

2024-08-05

Proof-of-concept exploits (1)

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

Security advisories

• https://git.savannah.gnu.org/cgit/patch.git/commit/?id=3fcd042d26d70856e826a42b5f93dc4854…
• http://packetstormsecurity.com/files/154124/GNU-patch-Command-Injection-Directory-Travers…

References

• CVE Record
• NVD entry