Debian Security Advisory

DLA-2670-1 nginx -- LTS security update

Date Reported:
30 May 2021
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 989095.
In Mitre's CVE dictionary: CVE-2021-23017.
More information:

Luis Merino, Markus Vervier and Eric Sesterhenn discovered an off-by-one in Nginx, a high-performance web and reverse proxy server, which could result in denial of service and potentially the execution of arbitrary code.

For Debian 9 stretch, this problem has been fixed in version 1.10.3-1+deb9u6.

We recommend that you upgrade your nginx packages.

For the detailed security status of nginx 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: