| Description: | 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).
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