CVE-2019-13636

Description

In GNU patch through 2.7.6, the following of symlinks is mishandled in certain cases other than input files. This affects inp.c and util.c.

Link	Tags
https://git.savannah.gnu.org/cgit/patch.git/commit/?id=dce4683cbbe107a95f1f0d45fabc304acfb5d71a	mailing list patch vendor advisory
https://lists.debian.org/debian-lts-announce/2019/07/msg00016.html	third party advisory mailing list
https://usn.ubuntu.com/4071-1/	vendor advisory
https://usn.ubuntu.com/4071-2/	vendor advisory
https://www.debian.org/security/2019/dsa-4489	vendor advisory
https://seclists.org/bugtraq/2019/Jul/54	mailing list
https://seclists.org/bugtraq/2019/Aug/29	mailing list
http://packetstormsecurity.com/files/154124/GNU-patch-Command-Injection-Directory-Traversal.html
https://security.gentoo.org/glsa/201908-22	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVWWGISFWACROJJPVJJL4UBLVZ7LPOLT/	vendor advisory
https://security.netapp.com/advisory/ntap-20190828-0001/
https://github.com/irsl/gnu-patch-vulnerabilities

What is the severity of CVE-2019-13636?: CVE-2019-13636 has been scored as a medium severity vulnerability.
How to fix CVE-2019-13636?: To fix CVE-2019-13636, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-13636 being actively exploited in the wild?: It is possible that CVE-2019-13636 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.