The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack. The function X509_issuer_and_serial_hash() is never directly called by OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on certificates that may have been obtained from untrusted sources. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).
Metrics
Affected Vendors & Products
References
History
Sun, 08 Sep 2024 18:30:00 +0000
Type | Values Removed | Values Added |
---|---|---|
CPEs | cpe:/a:redhat:acm:2.2::el7 |
Mon, 19 Aug 2024 22:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
CPEs | cpe:/a:redhat:acm:2.2::el8 |
MITRE
Status: PUBLISHED
Assigner: openssl
Published: 2021-02-16T16:55:18.817258Z
Updated: 2024-09-16T22:39:57.576Z
Reserved: 2021-01-12T00:00:00
Link: CVE-2021-23841
Vulnrichment
Updated: 2024-08-03T19:14:09.152Z
NVD
Status : Modified
Published: 2021-02-16T17:15:13.377
Modified: 2024-11-21T05:51:55.460
Link: CVE-2021-23841
Redhat