Advisory Published

USN-6233-2: YAJL vulnerabilities

First published: Thu Dec 14 2023(Updated: )

USN-6233-1 fixed vulnerabilities in YAJL. This update provides the corresponding updates for Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.04. Original advisory details: It was discovered that YAJL was not properly performing bounds checks when decoding a string with escape sequences. If a user or automated system using YAJL were tricked into processing specially crafted input, an attacker could possibly use this issue to cause a denial of service (application abort). (CVE-2017-16516) It was discovered that YAJL was not properly handling memory allocation when dealing with large inputs, which could lead to heap memory corruption. If a user or automated system using YAJL were tricked into running a specially crafted large input, an attacker could possibly use this issue to cause a denial of service. (CVE-2022-24795) It was discovered that memory leaks existed in one of the YAJL parsing functions. An attacker could possibly use this issue to cause a denial of service (memory exhaustion). (CVE-2023-33460)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/libyajl2<2.1.0-3ubuntu0.23.04.1
2.1.0-3ubuntu0.23.04.1
Ubuntu Linux=23.04
All of
ubuntu/libyajl2<2.1.0-3ubuntu0.22.04.1
2.1.0-3ubuntu0.22.04.1
Ubuntu Linux=22.04
All of
ubuntu/libyajl2<2.1.0-3ubuntu0.20.04.1
2.1.0-3ubuntu0.20.04.1
Ubuntu Linux=20.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-6233-2?

    USN-6233-2 addresses critical vulnerabilities in the YAJL library that could lead to denial of service or potentially arbitrary code execution.

  • How do I fix USN-6233-2?

    To fix USN-6233-2, update the libyajl2 package to the latest version available for your Ubuntu release.

  • Which Ubuntu versions are affected by USN-6233-2?

    USN-6233-2 affects Ubuntu 20.04 LTS, 22.04 LTS, and 23.04.

  • What specific vulnerabilities are covered in USN-6233-2?

    USN-6233-2 addresses specific vulnerabilities identified as CVE-2023-33460, CVE-2017-16516, and CVE-2022-24795.

  • Where can I find more information on USN-6233-2?

    For more details on USN-6233-2, refer to the official Ubuntu security advisory page.

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