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CVE-2022-1343

Status Candidate

Overview

The function `OCSP_basic_verify` verifies the signer certificate on an OCSP response. In the case where the (non-default) flag OCSP_NOCHECKS is used then the response will be positive (meaning a successful verification) even in the case where the response signing certificate fails to verify. It is anticipated that most users of `OCSP_basic_verify` will not use the OCSP_NOCHECKS flag. In this case the `OCSP_basic_verify` function will return a negative value (indicating a fatal error) in the case of a certificate verification failure. The normal expected return value in this case would be 0. This issue also impacts the command line OpenSSL "ocsp" application. When verifying an ocsp response with the "-no_cert_checks" option the command line application will report that the verification is successful even though it has in fact failed. In this case the incorrect successful response will also be accompanied by error messages showing the failure and contradicting the apparently successful result. Fixed in OpenSSL 3.0.3 (Affected 3.0.0,3.0.1,3.0.2).

Related Files

Ubuntu Security Notice USN-5402-1
Posted May 4, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5402-1 - Elison Niven discovered that OpenSSL incorrectly handled the c_rehash script. A local attacker could possibly use this issue to execute arbitrary commands when c_rehash is run. Raul Metsma discovered that OpenSSL incorrectly verified certain response signing certificates. A remote attacker could possibly use this issue to spoof certain response signing certificates. This issue only affected Ubuntu 22.04 LTS.

tags | advisory, remote, arbitrary, local, spoof
systems | linux, ubuntu
advisories | CVE-2022-1292, CVE-2022-1343, CVE-2022-1434, CVE-2022-1473
SHA-256 | 9f908328ff337686f5d5cffc66667d81dbd3b4ce35629e2bd3050e7444f1fd8b
OpenSSL Toolkit 3.0.3
Posted May 3, 2022
Site openssl.org

OpenSSL is a robust, fully featured Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols with full-strength cryptography world-wide. The 3.x series is the current major version of OpenSSL.

Changes: Fixed a bug in the c_rehash script which was not properly sanitizing shell metacharacters to prevent command injection. Fixed a bug in the function OCSP_basic_verify that verifies the signer certificate on an OCSP response. Fixed a bug where the RC4-MD5 ciphersuite incorrectly used the AAD data as the MAC key. Fixed a bug in the OPENSSL_LH_flush() function that breaks reuse of the memory occupied by the removed hash table entries.
tags | tool, encryption, protocol
systems | unix
advisories | CVE-2022-1292, CVE-2022-1343, CVE-2022-1434, CVE-2022-1473
SHA-256 | ee0078adcef1de5f003c62c80cc96527721609c6f3bb42b7795df31f8b558c0b
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