OpenSSL up to 1.0.2w/1.1.1h x509 Certificate GENERAL_NAME_cmp null pointer dereference

Summaryinfo

A vulnerability labeled as problematic has been found in OpenSSL up to 1.0.2w/1.1.1h. Affected by this vulnerability is the function GENERAL_NAME_cmp of the component x509 Certificate Handler. Such manipulation leads to null pointer dereference. This vulnerability is referenced as CVE-2020-1971. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in OpenSSL up to 1.0.2w/1.1.1h (Network Encryption Software). It has been rated as problematic. Affected by this issue is the function GENERAL_NAME_cmp of the component x509 Certificate Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability.

The weakness was published 12/08/2020 as 20201208.txt as confirmed security advisory (Website). The advisory is available at openssl.org. The public release has been coordinated with the vendor. This vulnerability is handled as CVE-2020-1971. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 211827 (Oracle Linux 9 : edk2 (ELSA-2024-12842)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.0.2x or 1.1.1i eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.openssl.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (211827). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Network Encryption Software

Name

• OpenSSL

Version

• 1.0.2a
• 1.0.2b
• 1.0.2c
• 1.0.2d
• 1.0.2e
• 1.0.2f
• 1.0.2g
• 1.0.2h
• 1.0.2i
• 1.0.2j
• 1.0.2k
• 1.0.2l
• 1.0.2m
• 1.0.2n
• 1.0.2o
• 1.0.2p
• 1.0.2q
• 1.0.2r
• 1.0.2s
• 1.0.2t
• 1.0.2u
• 1.0.2v
• 1.0.2w
• 1.1.1
• 1.1.1a
• 1.1.1b
• 1.1.1c
• 1.1.1d
• 1.1.1e
• 1.1.1f
• 1.1.1g
• 1.1.1h

License

• open-source

Website

• Product: https://www.openssl.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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