#4816: openssl-1.1.1j
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Reporter: renodr | Owner: lfs-book
Type: task | Status: new
Priority: high | Milestone: 10.1
Component: Book | Version: SVN
Severity: normal | Resolution:
Keywords: |
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Comment (by renodr):
{{{
OpenSSL Security Advisory [16 February 2021]
============================================
Null pointer deref in X509_issuer_and_serial_hash() (CVE-2021-23841)
====================================================================
Severity: Moderate
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.
This issue was reported to OpenSSL on 15th December 2020 by Tavis Ormandy
from
Google. The fix was developed by Matt Caswell.
}}}
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