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Vulnerability · Published Jul 17, 2022 · Assigned by mitre

CVE-2021-40874

Critical 9.8

In plain English

A critical-severity security flaw in the lemonldap-ng package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 68% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)1.2%top 32.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

An issue was discovered in LemonLDAP::NG (aka lemonldap-ng) 2.0.13. When using the RESTServer plug-in to operate a REST password validation service (for another LemonLDAP::NG instance, for example) and using the Kerberos authentication method combined with another method with the Combination authentication plug-in, any password will be recognized as valid for an existing user.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12lemonldap-ng2.0.14+ds-1DEBIAN-CVE-2021-40874
Debian:13lemonldap-ng2.0.14+ds-1DEBIAN-CVE-2021-40874
Debian:14lemonldap-ng2.0.14+ds-1DEBIAN-CVE-2021-40874
Ubuntu:22.04:LTSlemonldap-ngno fix listedUBUNTU-CVE-2021-40874
Ubuntu:24.04:LTSlemonldap-ngno fix listedUBUNTU-CVE-2021-40874
Ubuntu:25.10lemonldap-ngno fix listedUBUNTU-CVE-2021-40874
Ubuntu:26.04:LTSlemonldap-ngno fix listedUBUNTU-CVE-2021-40874
Ubuntu:26.10lemonldap-ngno fix listedUBUNTU-CVE-2021-40874

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References