CVE-2021-21707 The advisory has been revoked - it doesn't affect any version of package php5 (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1404-PHP5-2306615
- published2 Dec 2021
- disclosed29 Nov 2021
Introduced: 29 Nov 2021
CVE-2021-21707 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:14.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream php5 package and not the php5 package as distributed by Ubuntu.
In PHP versions 7.3.x below 7.3.33, 7.4.x below 7.4.26 and 8.0.x below 8.0.13, certain XML parsing functions, like simplexml_load_file(), URL-decode the filename passed to them. If that filename contains URL-encoded NUL character, this may cause the function to interpret this as the end of the filename, thus interpreting the filename differently from what the user intended, which may lead it to reading a different file than intended.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2021-21707
- https://bugs.php.net/bug.php?id=79971
- https://lists.debian.org/debian-lts-announce/2022/12/msg00030.html
- https://security.netapp.com/advisory/ntap-20211223-0005/
- https://www.debian.org/security/2022/dsa-5082
- https://www.tenable.com/security/tns-2022-09