Amazon Linux 2 Security Advisory: ALAS-2022-1738
Advisory Release Date: 2022-01-18 21:37 Pacific
Advisory Updated Date: 2022-01-20 19:32 Pacific
Severity:
Medium
Issue Overview:
A flaw was found in krb5. The Key Distribution Center (KDC) in MIT Kerberos 5 has a NULL pointer dereference via a FAST inner body that lacks a server field. An authenticated attacker could use this flaw to crash the Kerberos KDC server. The highest threat from this vulnerability is to system availability. (CVE-2021-37750)
Affected Packages:
krb5
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update krb5 to update your system.
New Packages:
aarch64:
krb5-devel-1.15.1-37.amzn2.2.4.aarch64
krb5-libs-1.15.1-37.amzn2.2.4.aarch64
krb5-server-1.15.1-37.amzn2.2.4.aarch64
krb5-server-ldap-1.15.1-37.amzn2.2.4.aarch64
krb5-workstation-1.15.1-37.amzn2.2.4.aarch64
krb5-pkinit-1.15.1-37.amzn2.2.4.aarch64
libkadm5-1.15.1-37.amzn2.2.4.aarch64
krb5-debuginfo-1.15.1-37.amzn2.2.4.aarch64
i686:
krb5-devel-1.15.1-37.amzn2.2.4.i686
krb5-libs-1.15.1-37.amzn2.2.4.i686
krb5-server-1.15.1-37.amzn2.2.4.i686
krb5-server-ldap-1.15.1-37.amzn2.2.4.i686
krb5-workstation-1.15.1-37.amzn2.2.4.i686
krb5-pkinit-1.15.1-37.amzn2.2.4.i686
libkadm5-1.15.1-37.amzn2.2.4.i686
krb5-debuginfo-1.15.1-37.amzn2.2.4.i686
src:
krb5-1.15.1-37.amzn2.2.4.src
x86_64:
krb5-devel-1.15.1-37.amzn2.2.4.x86_64
krb5-libs-1.15.1-37.amzn2.2.4.x86_64
krb5-server-1.15.1-37.amzn2.2.4.x86_64
krb5-server-ldap-1.15.1-37.amzn2.2.4.x86_64
krb5-workstation-1.15.1-37.amzn2.2.4.x86_64
krb5-pkinit-1.15.1-37.amzn2.2.4.x86_64
libkadm5-1.15.1-37.amzn2.2.4.x86_64
krb5-debuginfo-1.15.1-37.amzn2.2.4.x86_64