CVE-2021-23841

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).

• openssl openssl (>= 1.0.2 < 1.0.2y) • openssl openssl (>= 1.1.1 < 1.1.1j) • debian debian linux 10.0 • tenable nessus network monitor 5.11.0 • tenable nessus network monitor 5.11.1 • tenable nessus network monitor 5.12.0 • tenable nessus network monitor 5.12.1 • tenable nessus network monitor 5.13.0 • tenable tenable.sc (>= 5.13.0 <= 5.17.0) • apple safari (< 14.1.1) • apple ipados (< 14.6) • apple iphone os (< 14.6) • apple macos (>= 11.1 < 11.4) • netapp oncommand insight • netapp oncommand workflow automation • netapp snapcenter • oracle business intelligence 5.5.0.0.0 • oracle business intelligence 5.9.0.0.0 • oracle business intelligence 12.2.1.3.0 • oracle business intelligence 12.2.1.4.0 • oracle communications cloud native core policy 1.15.0 • oracle enterprise manager for storage management 13.4.0.0 • oracle enterprise manager ops center 12.4.0.0 • oracle essbase 21.2 • oracle graalvm 19.3.5 • oracle graalvm 20.3.1.2 • oracle graalvm 21.0.0.2 • oracle jd edwards world security a9.4 • oracle mysql enterprise monitor (< 8.0.23) • oracle mysql server (< 5.7.33) • oracle mysql server (>= 8.0.15 < 8.0.23) • oracle peoplesoft enterprise peopletools 8.57 • oracle peoplesoft enterprise peopletools 8.58 • oracle peoplesoft enterprise peopletools 8.59 • oracle zfs storage appliance kit 8.8 • siemens sinec ins (< 1.0) • siemens sinec ins 1.0