QID 239527

Date Published: 2021-08-05

QID 239527: Red Hat Update for rh-varnish6-varnish (RHSA-2021:2993)

Varnish Cache is a high-performance HTTP accelerator. It stores web pages in memory so web servers don't have to create the same web page over and over again, giving the website a significant speed up.The following packages have been upgraded to a later upstream version: rh-varnish6-varnish (6.0.8).

Security Fix(es): varnish: HTTP/2 request smuggling attack via a large Content-Length header for a POST request (CVE-2021-36740)

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 High - 6.5 severity.
  • CVSS V2 rated as High - 6.4 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-2021:2993 to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239527

    CVE-2021-36740 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:2993 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:2993?language=en
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