Input validation error in FreeIPA - CVE-2019-14867
Published: March 17, 2020
Vulnerability identifier: #VU26103
CSH Severity: High
CVSS v4.0: 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/E:U/U:Amber
CVE-ID: CVE-2019-14867
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: freeipa.org
Affected software:
FreeIPA
FreeIPA
Detailed vulnerability description
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.
How to mitigate CVE-2019-14867
Install updates from vendor's website.
Sources
- 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