CVE-2023-28862
An issue was discovered in LemonLDAP::NG before 2.16.1. Weak session ID generation in the...
An issue was discovered in LemonLDAP::NG before 2.16.1. Weak session ID generation in the AuthBasic handler and incorrect failure handling during a password check allow attackers to bypass 2FA verification. Any plugin that tries to deny session creation after the store step does not deny an AuthBasic session.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- 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 2.16.1. Weak session ID generation in the AuthBasic handler and incorrect failure handling during a password check allow attackers to bypass 2FA verification. Any plugin that tries to deny session creation after the store step does not deny an AuthBasic session.
- Record
CVE-2023-28862- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE List
An issue was discovered in LemonLDAP::NG before 2.16.1. Weak session ID generation in the AuthBasic handler and incorrect failure handling during a password check allow attackers to bypass 2FA verification. Any plugin that tries to deny session creation after the store step does not deny an AuthBasic session.
- Record
CVE-2023-28862- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
EUVDEUVD-2023-32483
An issue was discovered in LemonLDAP::NG before 2.16.1. Weak session ID generation in the AuthBasic handler and incorrect failure handling during a password check allow attackers to bypass 2FA verification. Any plugin that tries to deny session creation after the store step does not deny an AuthBasic session.
- Record
EUVD-2023-32483- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-r74q-xwhp-q6r9
An issue was discovered in LemonLDAP::NG before 2.16.1. Weak session ID generation in the...
An issue was discovered in LemonLDAP::NG before 2.16.1. Weak session ID generation in the AuthBasic handler and incorrect failure handling during a password check allow attackers to bypass 2FA verification. Any plugin that tries to deny session creation after the store step does not deny an AuthBasic session.
- Record
GHSA-r74q-xwhp-q6r9- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
OSV
An issue was discovered in LemonLDAP::NG before 2.16.1. Weak session ID generation in the AuthBasic handler and incorrect failure handling during a password check allow attackers to bypass 2FA verification. Any plugin that tries to deny session creation after the store step does not deny an AuthBasic session.
- Record
CVE-2023-28862- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2023-28862
An issue was discovered in LemonLDAP::NG before 2.16.1. Weak session ID generation in the AuthBasic handler and incorrect failure handling during a password check allow attackers to bypass 2FA verification. Any plugin that tries to deny session creation after the store step does not deny an AuthBasic session.
- Record
DEBIAN-CVE-2023-28862- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2023-28862
An issue was discovered in LemonLDAP::NG before 2.16.1. Weak session ID generation in the AuthBasic handler and incorrect failure handling during a password check allow attackers to bypass 2FA verification. Any plugin that tries to deny session creation after the store step does not deny an AuthBasic session.
- Record
UBUNTU-CVE-2023-28862- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/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 2.16.1+ds-1 | 2.16.1+ds-1 |
lemonldap-ngDebian:13 |
before 2.16.1+ds-1 | 2.16.1+ds-1 |
lemonldap-ngDebian:14 |
before 2.16.1+ds-1 | 2.16.1+ds-1 |
lemonldap-ngDebian:10 |
before 2.0.2+ds-7+deb10u9, 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+deb10u52.0.2+ds-7+deb10u62.0.2+ds-7+deb10u72.0.2+ds-7+deb10u8 |
2.0.2+ds-7+deb10u9 |
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 |
lemonldap-ngUbuntu:22.04:LTS |
All versions, plus listed versions 2.0.11+ds-42.0.13+ds-32.0.13+ds-3ubuntu1 |
None known |
lemonldap-ngUbuntu:24.04:LTS |
All versions, plus listed versions 2.16.2+ds-12.17.1+ds-12.17.2+ds-12.17.2+ds-22.18.1+ds-12.18.2+ds-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-28862 is a critical vulnerability (CVSS 9.8) in Lemonldap-ng Lemonldap\, published March 31, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.96%, the 61st percentile. Fixed in lemonldap-ng 2.16.1+ds-1.
References
gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/2896
lists.debian.org/debian-lts-announce/2023/07/msg00018.html
nvd.nist.gov/vuln/detail/CVE-2023-28862
github.com/advisories/GHSA-r74q-xwhp-q6r9