Debian Security Advisory

DLA-2794-1 php7.0 -- LTS security update

Date Reported:
27 Oct 2021
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 997003.
In Mitre's CVE dictionary: CVE-2021-21703.
More information:

An out-of-bounds read and write flaw was discovered in the PHP-FPM code, which could result in escalation of privileges from local unprivileged user to the root user.

For Debian 9 stretch, this problem has been fixed in version 7.0.33-0+deb9u12.

We recommend that you upgrade your php7.0 packages.

For the detailed security status of php7.0 please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: