QID 239903

Date Published: 2021-11-25

QID 239903: Red Hat Update for krb5 (RHSA-2021:4788)

kerberos is a network authentication system, which can improve the security of your network by eliminating the insecure practice of sending passwords over the network in unencrypted form.
It allows clients and servers to authenticate to each other with the help of a trusted third party, the kerberos key distribution center (kdc).

Security Fix(es):
  • krb5: null pointer dereference in process_tgs_req() in kdc/do_tgs_req.c via a fast inner body that lacks server field (cve-2021-37750)

Affected Products:

  • Red Hat enterprise linux server 7 x86_64
  • Red Hat enterprise linux workstation 7 x86_64
  • Red Hat enterprise linux desktop 7 x86_64
  • Red Hat enterprise linux for ibm z systems 7 s390x
  • Red Hat enterprise linux for power, big endian 7 ppc64
  • Red Hat enterprise linux for scientific computing 7 x86_64
  • Red Hat enterprise linux for power, little endian 7 ppc64le



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 Medium - 4 severity.
    • Solution
    Upgrade to the latest packages which contain a patch.

    Refer to Refer to :
    Applying Package Updates to RHEL system     for details.

    Refer to Red Hat security advisory RHSA-2021:4788 Update to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239903

    CVE-2021-37750 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:4788 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:4788
    By selecting these links, you may be leaving CVEreport webspace. We have provided these links to other websites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other websites that are more appropriate for your purpose. CVEreport does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, CVEreport does not endorse any commercial products that may be mentioned on these sites. Please address comments about any linked pages to [email protected].