Debian Security Advisory
DLA-2669-1 libxml2 -- LTS security update
- Date Reported:
- 30 May 2021
- Affected Packages:
- Security database references:
- In Mitre's CVE dictionary: CVE-2021-3541.
- More information:
An issue has been found in libxml2, the GNOME XML library. This issue is called "Parameter Laughs"-attack and is related to parameter entities expansion. It is similar to the "Billion Laughs"-attacks found earlier in libexpat. More information can be found at 
For Debian 9 stretch, this problem has been fixed in version 2.9.4+dfsg1-2.2+deb9u5.
We recommend that you upgrade your libxml2 packages.
For the detailed security status of libxml2 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/libxml2
Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS