Bugzilla – Bug 1218810
VUL-0: CVE-2023-6237: openssl-3: Excessive time spent checking invalid RSA public keys
Last modified: 2024-05-17 09:01:43 UTC
https://www.openssl.org/news/secadv/20240115.txt Excessive time spent checking invalid RSA public keys (CVE-2023-6237) ===================================================================== Severity: Low Issue summary: Checking excessively long invalid RSA public keys may take a long time. Impact summary: Applications that use the function EVP_PKEY_public_check() to check RSA public keys may experience long delays. Where the key that is being checked has been obtained from an untrusted source this may lead to a Denial of Service. When function EVP_PKEY_public_check() is called on RSA public keys, a computation is done to confirm that the RSA modulus, n, is composite. For valid RSA keys, n is a product of two or more large primes and this computation completes quickly. However, if n is an overly large prime, then this computation would take a long time. An application that calls EVP_PKEY_public_check() and supplies an RSA key obtained from an untrusted source could be vulnerable to a Denial of Service attack. The function EVP_PKEY_public_check() is not called from other OpenSSL functions however it is called from the OpenSSL pkey command line application. For that reason that application is also vulnerable if used with the "-pubin" and "-check" options on untrusted data. The OpenSSL SSL/TLS implementation is not affected by this issue. The OpenSSL 3.0 and 3.1 FIPS providers are affected by this issue. OpenSSL versions 3.0.0 to 3.0.12, 3.1.0 to 3.1.4 and 3.2.0 are vulnerable to this issue. OpenSSL versions 1.1.1 and 1.0.2 are not affected by this issue. Due to the low severity of this issue we are not issuing new releases of OpenSSL at this time. The fix will be included in the next releases when they become available. The fix is also available in commit 0b0f7abf (for 3.2), commit a830f551 (for 3.1) and commit 18c02492 (for 3.0) in the OpenSSL git repository. This issue was reported on 2nd November 2023 by OSS-Fuzz. The fix was developed by Tomas Mraz.
This is an autogenerated message for OBS integration: This bug (1218810) was mentioned in https://build.opensuse.org/request/show/1139418 Factory / openssl-3
All patches were submitted (see above comments), assigning back to security team.
This is an autogenerated message for OBS integration: This bug (1218810) was mentioned in https://build.opensuse.org/request/show/1139767 Factory / openssl-3
SUSE-SU-2024:0172-1: An update that solves two vulnerabilities can now be installed. Category: security (moderate) Bug References: 1218690, 1218810 CVE References: CVE-2023-6129, CVE-2023-6237 Sources used: openSUSE Leap 15.5 (src): openssl-3-3.0.8-150500.5.24.1 Basesystem Module 15-SP5 (src): openssl-3-3.0.8-150500.5.24.1 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
This is an autogenerated message for OBS integration: This bug (1218810) was mentioned in https://build.opensuse.org/request/show/1142584 Factory / openssl-3
SUSE-SU-2024:0518-1: An update that solves three vulnerabilities can now be installed. Category: security (moderate) Bug References: 1218690, 1218810, 1219243 CVE References: CVE-2023-6129, CVE-2023-6237, CVE-2024-0727 Sources used: SUSE Linux Enterprise Desktop 15 SP4 LTSS 15-SP4 (src): openssl-3-3.0.8-150400.4.49.1 SUSE Linux Enterprise Server 15 SP4 LTSS 15-SP4 (src): openssl-3-3.0.8-150400.4.49.1 SUSE Linux Enterprise Server for SAP Applications 15 SP4 (src): openssl-3-3.0.8-150400.4.49.1 SUSE Manager Proxy 4.3 (src): openssl-3-3.0.8-150400.4.49.1 SUSE Manager Retail Branch Server 4.3 (src): openssl-3-3.0.8-150400.4.49.1 SUSE Manager Server 4.3 (src): openssl-3-3.0.8-150400.4.49.1 openSUSE Leap 15.4 (src): openssl-3-3.0.8-150400.4.49.1 openSUSE Leap Micro 5.3 (src): openssl-3-3.0.8-150400.4.49.1 openSUSE Leap Micro 5.4 (src): openssl-3-3.0.8-150400.4.49.1 SUSE Linux Enterprise Micro for Rancher 5.3 (src): openssl-3-3.0.8-150400.4.49.1 SUSE Linux Enterprise Micro 5.3 (src): openssl-3-3.0.8-150400.4.49.1 SUSE Linux Enterprise Micro for Rancher 5.4 (src): openssl-3-3.0.8-150400.4.49.1 SUSE Linux Enterprise Micro 5.4 (src): openssl-3-3.0.8-150400.4.49.1 SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (src): openssl-3-3.0.8-150400.4.49.1 SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (src): openssl-3-3.0.8-150400.4.49.1 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
All done, closing.