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389-ds-base: 389-ds-base: unbounded ldap controls count in get_ldapmessage_controls_ext() causes cpu and heap amplification (remote dos) (389-ds-base)

CVE-2026-9064
HIGH 7.5

At a glance

Source
NVD
EPSS
EPSS 0.81 % · percentile 57 ()
State
PUBLISHED
Published
Updated
Assigner
redhat
NVD status
Modified

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Description

A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function in the LDAP server does not enforce an upper bound on the number of controls per LDAP message. A remote, unauthenticated attacker can send a specially crafted LDAP request containing hundreds of thousands of minimal controls within the default maximum BER message size (2 MB), causing excessive CPU consumption and heap allocation on the server. Under concurrent exploitation, this leads to significant latency degradation, worker thread starvation, or out-of-memory termination, resulting in a denial of service.

Weaknesses (CWE)

  • CWE-770 — Allocation of Resources Without Limits or Throttling

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hredhat
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hredhat-SADP
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HNVD · secalert@redhat.com (Secondary)
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HNVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)

European references

Affected configurations (NVD CPE)

Affected products

ProductVersions
389-ds-baseaffected 0
Red Hat · Red Hat Directory Server 11.5 E4S for RHEL 8unaffected 8060020260609102432.0ca98e7e < *
Red Hat · Red Hat Directory Server 11.7 E4S for RHEL 8unaffected 8080020260610130252.f969626e < *
Red Hat · Red Hat Directory Server 11.9 for RHEL 8unaffected 8100020260601104139.37ed7c03 < *
Red Hat · Red Hat Directory Server 12.2 E4S for RHEL 9unaffected 9020020260615123354.1674d574 < *
Red Hat · Red Hat Directory Server 12.4 E4S for RHEL 9unaffected 9040020260611130021.1674d574 < *
Red Hat · Red Hat Enterprise Linux 10unaffected 0:3.2.0-7.el10_2 < *
Red Hat · Red Hat Enterprise Linux 10.0 Extended Update Supportunaffected 0:3.0.6-18.el10_0 < *
Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle Supportunaffected 0:1.3.11.1-12.el7_9 < *
Red Hat · Red Hat Enterprise Linux 8unaffected 8100020260601102239.25e700aa < *
Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportunaffected 8040020260609102422.96015a92 < *
Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onunaffected 8040020260609102422.96015a92 < *
Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportunaffected 8060020260609102416.824efc52 < *
Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Onunaffected 8060020260609102416.824efc52 < *
Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Serviceunaffected 8080020260610125847.6dbb3803 < *
Red Hat · Red Hat Enterprise Linux 8.8 Update Services for SAP Solutionsunaffected 8080020260610125847.6dbb3803 < *
Red Hat · Red Hat Enterprise Linux 9unaffected 0:2.8.0-7.el9_8 < *
Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutionsunaffected 0:2.2.4-18.el9_2 < *
Red Hat · Red Hat Enterprise Linux 9.4 Update Services for SAP Solutionsunaffected 0:2.4.5-25.el9_4 < *
Red Hat · Red Hat Enterprise Linux 9.6 Extended Update Supportunaffected 0:2.6.1-21.el9_6 < *

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD