Input validation error in FreeIPA - CVE-2019-14867

Vulnerability identifier: #VU26103

CSH Severity: High

CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-14867

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input within the ber_scanf() function when processing kerberos key data. A remote non-authenticated attacker with ability to trigger parsing of the krb principal key, can pass specially crafted krb principal key to the IPA server and crash it or execute arbitrary code on the target system.

FreeIPA
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Fedora
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
ipa (Red Hat package)
freeipa

Install updates from vendor's website.

FreeIPA - addressed in versions 4.6.7, 4.7.4, 4.8.3
ipa (Red Hat package) - update to 4.6.5-11.el7_7.4
freeipa - addressed in versions 4.7.4-1.fc29, 4.8.3-1.fc30, 4.8.3-1.fc31

• https://access.redhat.com/errata/RHSA-2020:0378
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14867
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/67SEUWJAJ5RMH5K4Q6TS2I7HIMXUGNKF/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WLFL5XDCJ3WT6JCLCQVKHZBLHGW7PW4T/
• https://www.freeipa.org/page/Releases/4.6.7
• https://www.freeipa.org/page/Releases/4.7.4
• https://www.freeipa.org/page/Releases/4.8.3

• Multiple vulnerabilities in FreeIPA
• Red Hat Enterprise Linux bugfix update for IPA
• Red Hat Enterprise Linux 8 update for the idm:DL1 module
• Red Hat Enterprise Linux 7 update for ipa
• Fedora 31 update for freeipa
• Fedora 30 update for freeipa
• Fedora 29 update for freeipa