Debian 9: DLA-2928-1 Critical: Htmldoc Stack Issues and Exploits

Several issues have been found in htmldoc, an HTML processor that
generates indexed HTML, PS, and PDF.

CVE-2022-0534

A crafted GIF file could lead to a stack out-of-bounds read,
which could result in a crash (segmentation fault).

CVE-2021-43579

Converting an HTML document, which links to a crafted BMP file,
could lead to a stack-based buffer overflow, which could result
in remote code execution.

CVE-2021-40985

A crafted BMP image could lead to a buffer overflow, which could
cause a denial of service.


For Debian 9 stretch, these problems have been fixed in version
1.8.27-8+deb9u2.

We recommend that you upgrade your htmldoc packages.

For the detailed security status of htmldoc please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/htmldoc

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