# CVE-2019-13636: patch: The patch program applies diff files to originals

CVE-2019-13636 is fixed in patch on 1 platform, first by patch 2.7.6-2ubuntu1.1, released August 15, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-13636
- Priority: Routine
- CVSS: 5.9 (Moderate)
- EPSS: 0.0390
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 16, 2019

## Description

The patch program applies diff files to originals. The diff command is used to compare an original to a changed file. Diff lists the changes made to the file. A person who has the original file can then use the patch command with the diff file to add the changes to their original file (patching the file).  Security Fix(es):  * patch: the following of symlinks in inp.c and util.c is mishandled in cases other than input files (CVE-2019-13636)  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.  Additional Changes:  For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.2 Release Notes linked from the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | patch RHEL 8 | 0:2.7.6-11.el8 | [RHSA-2020:1852](https://patchblox.com/security/data/fix/linux/rhsa-2020-1852.md) | Apr 28, 2020 |
| Linux | patch Ubuntu 18.04.6 LTS (bionic) | 2.7.6-2ubuntu1.1 | [patch 2.7.6-2ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-patch-2.7.6-2ubuntu1.1.md) | Aug 15, 2019 |
| Linux | patch ol 8 | 0:2.7.6-11.el8 | [ELSA-2020-1852](https://patchblox.com/security/data/fix/linux/elsa-2020-1852.md) | May 5, 2020 |

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