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Ubuntu Security Notice USN-7001-2
September 17, 2024

libxmltok vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 24.04 LTS

Summary:

Several security issues were fixed in libxmltok.

Software Description:
- libxmltok: XML Parser Toolkit, developer libraries

Details:

USN-7001-1 fixed vulnerabilities in xmltol library. This update
provides the corresponding updates for Ubuntu 24.04 LTS.

Original advisory details:

  Shang-Hung Wan discovered that Expat, contained within the xmltok library,
  did not properly handle certain function calls when a negative input
  length was provided. An attacker could use this issue to cause a denial of
  service or possibly execute arbitrary code. (CVE-2024-45490)

  Shang-Hung Wan discovered that Expat, contained within the xmltok library,
  did not properly handle the potential for an integer overflow on 32-bit
  platforms. An attacker could use this issue to cause a denial of service
  or possibly execute arbitrary code. (CVE-2024-45491)

Update instructions:

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

Ubuntu 24.04 LTS
   libxmltok1t64                   1.2-4.1ubuntu2.24.0.4.1+esm1
                                   Available with Ubuntu Pro

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

References:
   https://ubuntu.com/security/notices/USN-7001-2
   https://ubuntu.com/security/notices/USN-7001-1
   CVE-2024-45490, CVE-2024-45491