High severity · published Aug 16, 2019
CVE-2018-20969
do_ed_script in pch.c in GNU patch through 2.7.6 does not block strings beginning with a ! character
7.8
CVSS
2.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.7% · higher than 86% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PA
Patch · Gnu
through 2.7.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-20969
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-20969
Third Party Advisory
http://packetstormsecurity.com/files/154124/GNU-patch-Command-Injection-Directory-Traversal.html
access.redhat.com
https://access.redhat.com/errata/RHSA-2019:2798
access.redhat.com
https://access.redhat.com/errata/RHSA-2019:2964
access.redhat.com
https://access.redhat.com/errata/RHSA-2019:3757
access.redhat.com
https://access.redhat.com/errata/RHSA-2019:3758
access.redhat.com
https://access.redhat.com/errata/RHSA-2019:4061
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