CVE-2025-61912

python-ldap is a lightweight directory access protocol (LDAP) client API for Python. In versions prior to 3.4.5, ldap.dn.escape_dn_chars() escapes \x00 incorrectly by emitting a backslash followed by a literal NUL byte instead of the RFC-4514 hex form \00. Any application that uses this helper to construct DNs from untrusted input can be made to consistently fail before a request is sent to the LDAP server (e.g., AD), resulting in a client-side denial of service. Version 3.4.5 contains a patch for the issue.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
GitHub_MCNA
---
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CISA-ADPADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 17%
VendorProductVersion
python-ldappython-ldap
𝑥
< 3.4.5
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
python-ldap
bullseye
postponed
trixie
no-dsa
bookworm
no-dsa
forky
vulnerable
sid
vulnerable
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
python-ldap
questing
Fixed 3.4.4-1ubuntu0.25.10.1
released
plucky
Fixed 3.4.4-1ubuntu0.25.04.1
released
noble
Fixed 3.4.4-1ubuntu0.24.04.1
released
jammy
Fixed 3.2.0-4ubuntu7.2
released
focal
Fixed 3.2.0-4ubuntu2.1+esm1
released
bionic
Fixed 3.0.0-1ubuntu0.2+esm1
released
xenial
Fixed 2.4.22-0.1ubuntu0.1~esm1
released