PT-2021-20923 · Unknown · Lemonldap::Ng

Yadd · Published 2021-07-27 · Updated 2024-11-19 · CVE-2021-35473

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions: LemonLDAP::NG versions 2.0.4 through 2.0.12

Description: An issue was discovered in the OAuth2.0 handler where it does not verify access token validity due to a missing expiration check. This allows an attacker to use an expired access token from an OIDC client to access the OAuth2 handler.

Recommendations: For versions 2.0.4 through 2.0.12, update to version 2.0.12 or later to resolve the issue. As a temporary workaround, consider restricting access to the OAuth2 handler until a patch is applied.

Fix

Insufficient Session Expiration

Weakness Enumeration

CWE-613

Related Identifiers

CVE-2021-35473

Affected Products

Lemonldap::Ng

References · 14

• https://cve.org/CVERecord?id=CVE-2021-35473 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-35473 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-35473 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-35473 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-35473 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-35473 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-35473 · Vendor Advisory
• https://twitter.com/CVEnew/status/1855742761569288621 · Twitter Post
• https://t.me/cvedetector/10441 · Telegram Post
• https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/tags · Note
• https://twitter.com/transilienceai/status/1856752348233961555 · Twitter Post
• https://twitter.com/transilienceai/status/1856752359369769253 · Twitter Post
• https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/2549 · Note
• https://t.me/cvenotify/101247 · Telegram Post