PT-2023-7018 · Univention · Univention Corporate Server

Raphael Kuhn · Published 2023-10-31 · Updated 2024-01-31 · CVE-2023-38994

Positive Technologies (AI Summary)

CVSS v3.1

7.9

High

Base vector

AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions Univention Corporate Server (UCS) versions 5.0-5

Description The issue is related to the check univention joinstatus prometheus monitoring script, which reveals the LDAP plaintext password of the machine account in the process list. This allows attackers with local ssh access to gain higher privileges and perform follow-up attacks. By default, the configuration of UCS does not allow local ssh access for regular users. The exploitation of this issue may permit an attacker to elevate their privileges.

Recommendations For Univention Corporate Server (UCS) versions 5.0-5, consider disabling the check univention joinstatus function as a temporary workaround until a patch is available. Restrict access to the process list to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Exposure of Resource to Wrong Sphere

Weakness Enumeration

CWE-668

Related Identifiers

BDU:2023-08039

CVE-2023-38994

Affected Products

Univention Corporate Server

References · 11

• 🔥 https://drive-byte.de/en/blog/simple-yet-effective-the-story-of-some-simple-bugs-that-led-to-the-complete-compromise-of-a-network · Exploit
• https://forge.univention.org/bugzilla/show_bug.cgi?id=56324 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-38994 · Security Note
• https://forge.univention.org/bugzilla/show_bug.cgi?id=56324#c0 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-38994 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-08039 · Security Note
• https://t.me/cvenotify/69335 · Telegram Post
• https://forge.univention.org/bugzilla/show_bug.cgi?id=56324#c0y · Note
• https://vuldb.com/ru/?id.244060 · Note
• https://raeph123.github.io/BlogPosts/Univention/Simple_yet_effective_The_story_of_some_simple_bugs_that_led_to_the_complete_compromise_of_a_network_en.html · Note
• https://t.me/cibsecurity/73222 · Telegram Post