CVE-2021-35472
An issue was discovered in LemonLDAP::NG before 2.0.12. Session cache corruption can lead to...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-35472- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.0 Medium
AV:N/AC:M/Au:S/C:P/I:P/A:P - Weakness
- CWE-307
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2021-35472- Updated
- 2026-11-02
EUVDEUVD-2021-22114 No score
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.
- Record
EUVD-2021-22114- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-9v87-664x-72qc No score
An issue was discovered in LemonLDAP::NG before 2.0.12. Session cache corruption can lead to...
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.
- Record
GHSA-9v87-664x-72qc- Weakness
- CWE-307
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2021-35472- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-35472
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.
- Record
DEBIAN-CVE-2021-35472- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-35472
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.
- Record
UBUNTU-CVE-2021-35472- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
lemonldap-ngDebian:12 |
before 2.0.11+ds-4 | 2.0.11+ds-4 |
lemonldap-ngDebian:13 |
before 2.0.11+ds-4 | 2.0.11+ds-4 |
lemonldap-ngDebian:14 |
before 2.0.11+ds-4 | 2.0.11+ds-4 |
lemonldap-ngDebian:10 |
before 2.0.2+ds-7+deb10u6, plus listed versions 2.0.2+ds-7+deb10u12.0.2+ds-7+deb10u22.0.2+ds-7+deb10u32.0.2+ds-7+deb10u42.0.2+ds-7+deb10u5 |
2.0.2+ds-7+deb10u6 |
lemonldap-ngUbuntu:16.04:LTS |
All versions, plus listed versions 1.3.3-11.4.6-11.4.6-21.4.6-3 |
None known |
lemonldap-ngUbuntu:18.04:LTS |
All versions, plus listed versions 1.9.10-11.9.13-21.9.14-11.9.15-11.9.16-2 |
None known |
lemonldap-ngUbuntu:20.04:LTS |
All versions, plus listed versions 2.0.5+ds-22.0.6+ds-22.0.7+ds-2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-35472 is a high vulnerability (CVSS 8.8) in Debian Linux, published July 23, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.80%, the 78th percentile. Fixed in lemonldap-ng 2.0.11+ds-4.
References
gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/2539
debian.org/security/2021/dsa-4943
nvd.nist.gov/vuln/detail/CVE-2021-35472
github.com/advisories/GHSA-9v87-664x-72qc
security-tracker.debian.org/tracker/CVE-2021-35472
ubuntu.com/security/CVE-2021-35472
cve.org/CVERecord?id=CVE-2021-35472