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Ubuntu Security Notice USN-7001-1
September 12, 2024
libxmltok vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in libxmltok.
Software Description:
- libxmltok: XML Parser Toolkit, runtime libraries
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 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 22.04 LTS
   libxmltok1                      1.2-4ubuntu0.22.04.1~esm3
                                   Available with Ubuntu Pro
Ubuntu 20.04 LTS
   libxmltok1                      1.2-4ubuntu0.20.04.1~esm3
                                   Available with Ubuntu Pro
Ubuntu 18.04 LTS
   libxmltok1                      1.2-4ubuntu0.18.04.1~esm3
                                   Available with Ubuntu Pro
Ubuntu 16.04 LTS
   libxmltok1                      1.2-3ubuntu0.16.04.1~esm4
                                   Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
   https://ubuntu.com/security/notices/USN-7001-1
   CVE-2024-45490, CVE-2024-45491