* patch: do_ed_script in pch.c does not block strings beginning with a !
character (CVE-2018-20969)
* patch: OS shell command injection when processing crafted patch files
(CVE-2019-13638)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.
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