USN-7189-1: HTMLDOC vulnerabilities

8 January 2025

Several security issues were fixed in HTMLDOC.

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Releases

Packages

  • htmldoc - HTML processor that generates indexed HTML, PS, and PDF

Details

It was discovered that HTMLDOC incorrectly handled certain inputs, which
could lead to an integer overflow. An attacker could potentially use this
issue to cause a denial of service or execute arbitrary code.
(CVE-2021-20308)

It was discovered that HTMLDOC incorrectly handled memory in pspdf_export,
which could lead to a double-free. An attacker could potentially use this
issue to cause a denial of service or execute arbitrary code.
(CVE-2021-23158)

It was discovered that HTMLDOC incorrectly handled memory when loading a
JPEG image, which could lead to a NULL pointer dereference. An attacker
could potentially use this issue to cause a denial of service.
(CVE-2021-23191, CVE-2021-26948)

It was discovered that HTMLDOC incorrectly handled certain inputs, which
could lead to a stack buffer overflow. An attacker could potentially use
this issue to cause a denial of service or execute arbitrary code.
(CVE-2021-23206, CVE-2021-40985, CVE-2021-43579)

It was discovered that HTMLDOC incorrectly handled memory in
pdpdf_prepare_page and render_table_row, which could lead to a heap buffer
overflow. An attacker could potentially use this issue to cause a denial
of service or execute arbitrary code. (CVE-2021-26252, CVE-2021-26259)

It was discovered that HTMLDOC incorrectly handled memory in
parse_paragraph, which could lead to a heap buffer overflow. An attacker
could potentially use this issue to cause a denial of service or execute
arbitrary code. This issue only affected Ubuntu 20.04 LTS. (CVE-2021-34119)

It was discovered that HTMLDOC incorrectly handled memory in parse_tree.
An attacker could potentially use this issue to leak sensitive
information. (CVE-2021-34121)

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04
Ubuntu 14.04

In general, a standard system update will make all the necessary changes.

References

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