A buffer over-read flaw was found in RH kernel versions before 5.0 in crypto_authenc_extractkeys in crypto/authenc.c in the IPsec Cryptographic algorithm's module, authenc. When a payload longer than 4 bytes, and is not following 4-byte alignment boundary guidelines, it causes a buffer over-read threat, leading to a system crash. This flaw allows a local attacker with user privileges to cause a denial of service.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-10769
• https://bugzilla.redhat.com/show_bug.cgi?id=1708775;
• https://lkml.org/lkml/2019/1/21/675
• https://www.oracle.com/security-alerts/cpuApr2021.html
• http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html
• https://access.redhat.com/errata/RHSA-2020:3545
• https://access.redhat.com/errata/RHSA-2020:5437
• https://access.redhat.com/errata/RHSA-2020:5441
• https://access.redhat.com/security/cve/CVE-2020-10769
• https://bugzilla.redhat.com/show_bug.cgi?id=1708775
• https://bugzilla.redhat.com/show_bug.cgi?id=1708775%3B