zlib up to 1.2.12 Header inflate.c inflateGetHeader heap-based overflow

Summaryinfo

A vulnerability classified as critical was found in zlib up to 1.2.12. This issue affects the function inflateGetHeader of the file inflate.c of the component Header Handler. Executing a manipulation can lead to heap-based overflow. This vulnerability is registered as CVE-2022-37434. It is possible to launch the attack remotely. No exploit is available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as critical was found in zlib up to 1.2.12. This vulnerability affects the function inflateGetHeader of the file inflate.c of the component Header Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

zlib through 1.2.12 has a heap-based buffer over-read or buffer overflow in inflate in inflate.c via a large gzip header extra field. NOTE: only applications that call inflateGetHeader are affected. Some common applications bundle the affected zlib source code but may be unable to call inflateGetHeader (e.g., see the nodejs/node reference).

The weakness was published 08/05/2022. The advisory is shared for download at github.com. This vulnerability was named CVE-2022-37434 since 08/05/2022. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 215940 (Azure Linux 3.0 Security Update: cloud-hypervisor-cvm / crash / zlib (CVE-2022-37434)), which helps to determine the existence of the flaw in a target environment.

Applying the patch eff308af425b67093bab25f80f1ae950166bece1 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (215940). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• zlib

Version

• 1.2.0
• 1.2.1
• 1.2.2
• 1.2.3
• 1.2.4
• 1.2.5
• 1.2.6
• 1.2.7
• 1.2.8
• 1.2.9
• 1.2.10
• 1.2.11
• 1.2.12

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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Once again VulDB remains the best source for vulnerability data.

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