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CVE Record

CVE-2021-35472: An issue was discovered in LemonLDAP::NG before 2.0.12.

An issue was discovered in LemonLDAP::NG before 2.0.12. Session cache corruption can lead to authorization bypass or spoofing. By running a loop that makes many authentication attempts, an attacker might alternately be authenticated as one of two different users.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

LemonLDAP::NG before 2.0.12 can mishandle session cache state in a way that may let an attacker be authenticated as another user. For organizations relying on LemonLDAP::NG for access control, this is a serious identity and authorization risk even though the source bundle does not provide a CVSS score.

Executive priority

Treat this as high priority if LemonLDAP::NG is used for enterprise authentication. The issue can affect trust in user identity and access decisions, so remediation should be scheduled promptly, especially for externally reachable or privileged access gateways.

Technical view

CVE-2021-35472 describes session cache corruption in LemonLDAP::NG before 2.0.12. The reported impact is authorization bypass or spoofing, where repeated authentication attempts might cause authentication to alternate between two users. The bundle names upstream issue, tag, commit, and Debian DSA-4943 references, but provides limited implementation detail.

Likely exposure

Exposure is limited to environments running LemonLDAP::NG before 2.0.12. Debian users should also review DSA-4943. Systems are most exposed where LemonLDAP::NG protects sensitive applications or administrative access paths.

Exploitation context

The bundle describes a repeated-authentication-attempt scenario, but does not cite public exploitation in the wild. The CVE is not listed as KEV in the provided data, so active exploitation should not be assumed.

Researcher notes

Evidence is sparse in the bundle: no CVSS, CWE, or detailed affected package matrix is provided. Analysis should stay anchored to LemonLDAP::NG before 2.0.12, the upstream issue, the fixing commit, tag history, and Debian DSA-4943.

Mitigation direction

  • Upgrade LemonLDAP::NG to 2.0.12 or later.
  • Apply Debian packages referenced by DSA-4943 where applicable.
  • Review upstream issue and commit for vendor-specific deployment guidance.
  • Check vendor advisories before deploying compensating controls.
  • Prioritize systems protecting privileged or sensitive applications.

Validation and detection

  • Inventory all LemonLDAP::NG deployments and package versions.
  • Confirm each deployment is running 2.0.12 or a fixed vendor package.
  • Review authentication logs for unusual repeated attempts around the same users.
  • Validate authorization boundaries in staging after upgrading.
  • Document remaining unsupported or unverifiable instances.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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description · low confidence lookup

Privilege behavior lookup

The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2021-35472 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.