CVE-2021-40874 describes a critical authentication bypass vulnerability in LemonLDAP::NG version 2.0.13. Specifically, when the RESTServer plugin is configured to use Kerberos authentication in combination with another method, any password will be accepted as valid for an existing user. This flaw carries a CVSS score of 9.8 (CRITICAL), indicating it can be exploited remotely with low complexity, leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation, nor publicly available exploit code, the high severity and ease of exploitation warrant immediate attention for affected Debian and LemonLDAP::NG installations.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
2.0.13CPE matchmatch criteria | cpe:2.3:a:lemonldap-ng:lemonldap\:\:ng:2.0.13:*:*:*:*:*:*:* | ||
10.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.