PT-2021-4001 · Unknown · Lemonldap::Ng

Yadd · Published 2021-06-08 · Updated 2021-08-11 · CVE-2021-35472

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions LemonLDAP::NG versions prior to 2.0.12

Description The issue is related to an error in handling user-controlled authorization keys in the authentication system of LemonLDAP::NG. This can be exploited by a remote attacker to conduct spoofing attacks. Session cache corruption can lead to authorization bypass or spoofing, allowing an attacker to be authenticated as one of two different users by making many authentication attempts in a loop.

Recommendations For versions prior to 2.0.12, update to version 2.0.12 or later to resolve the issue. As a temporary workaround, consider restricting access to sensitive areas of the application to minimize the risk of exploitation. Avoid using the authentication system until the issue is resolved.

Exploit

Fix

IDOR

Improper Restriction of Excessive Authentication Attempts

Weakness Enumeration

CWE-639

CWE-307

Related Identifiers

BDU:2021-04525

CVE-2021-35472

DSA-4943-1

Affected Products

Lemonldap::Ng

References · 15

• 🔥 https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/2539 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-35472 · Security Note
• https://ubuntu.com/security/CVE-2021-35472 · Vendor Advisory
• https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/tags · Patch
• https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/commit/8d3b763b6af2b8a9c4ad2765fbfabffec8a73af5 · Patch
• https://debian.org/security/2021/dsa-4943 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4943-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-35472 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-04525 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-35472 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-35472 · Security Note
• https://osv.dev/vulnerability/CVE-2021-35472 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-35472 · Vendor Advisory
• https://vuldb.com/?id.179789 · Note
• https://t.me/cibsecurity/26620 · Telegram Post