TI-2024-19034 Aliases CVE-2024-28820 GHSA-wv29-6vvq-vc4h

Buffer overflow in the extract_openvpn_cr function in openvpn-cr.c in openvpn-auth-ldap…

LOW 28CWE-125Published 2024-06-27 · Updated 2024-11-04

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: Low · Low · Low
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

Buffer overflow in the extract_openvpn_cr function in openvpn-cr.c in openvpn-auth-ldap (aka the Three Rings Auth-LDAP plugin for OpenVPN) 2.0.4 allows attackers with a valid LDAP username and who can control the challenge/response password field to pass a string with more than 14 colons into this field and cause a buffer overflow.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00421 36th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE names CISA-ADP · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:threerings:openvpn-auth-ldap::::::::	—	—	—

cpe:2.3:a:threerings:openvpn-auth-ldap:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2024-28820
2026-10-03 Alias added: GHSA-wv29-6vvq-vc4h

References

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences