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CVE-2018-20969

Disclosure Date: August 16, 2019 (last updated October 06, 2023)
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.