QID 239446

QID 239446: Red Hat Update for rh-nginx118-nginx (RHSA-2021:2258)

nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage.

Security Fix(es): nginx: Off-by-one in ngx_resolver_copy()
when labels are followed by a pointer to a root domain name (CVE-2021-23017)

Affected Products:

Red Hat Software Collections (for RHEL Server) 1 for RHEL 7.7 x86_64
Red Hat Software Collections (for RHEL Server for System Z) 1 for RHEL 7.7 s390x
Red Hat Software Collections (for RHEL Server for IBM Power LE) 1 for RHEL 7.7 ppc64le
Red Hat Software Collections (for RHEL Server) 1 for RHEL 7 x86_64
Red Hat Software Collections (for RHEL Server for System Z) 1 for RHEL 7 s390x
Red Hat Software Collections (for RHEL Server for IBM Power LE) 1 for RHEL 7 ppc64le
Red Hat Software Collections (for RHEL Workstation) 1 for RHEL 7 x86_64

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

On successful exploitation, it could allow an attacker to execute code.

  • CVSS V3 rated as Critical - 9.8 severity.
  • CVSS V2 rated as High - 7.5 severity.
    • Solution
    Upgrade to the latest packages which contain a patch. Refer to Applying Package Updates to RHEL system for details.

    Refer to Red Hat security advisory RHSA-2021:2258 to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239446

    CVE-2021-23017 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:2258 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:2258?language=en
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