#VU26103 Input validation error in FreeIPA - CVE-2019-14867

Vulnerability identifier: #VU26103

Vulnerability risk: High

CVSSv4.0: 7.2 [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/E:U/U:Amber]

CVE-ID: CVE-2019-14867

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FreeIPA
Other software / Other software solutions

Vendor: freeipa.org

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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FreeIPA: 4.6.0 - 4.6.6, 4.7.0 - 4.7.3, 4.8.0 - 4.8.2

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External links
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

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.