389-ds-base: 389-ds-base: unbounded ldap controls count in get_ldapmessage_controls_ext() causes cpu and heap amplification (remote dos)
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- 389-ds-base
0
- redhat-ds:11
Version range not reported
- redhat-ds:11
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- redhat-ds:11
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- redhat-ds:12
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- redhat-ds:12
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- 389-ds-base
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- 389-ds-base
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- 389-ds-base
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- 389-ds:1.4
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- 389-ds:1.4
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- 389-ds:1.4
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- 389-ds:1.4
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- 389-ds:1.4
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- 389-ds:1.4
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- 389-ds:1.4
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- 389-ds-base
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- 389-ds-base
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- 389-ds-base
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- 389-ds-base
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- dirsrv/dirsrv-container-rhel10
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- redhat-ds:12/389-ds-base
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- 389-ds-base
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- 389-ds-base
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References 19
access.redhat.com
- errata/RHSA-2026:26452
- errata/RHSA-2026:26453
- errata/RHSA-2026:26454
- errata/RHSA-2026:26455
- errata/RHSA-2026:26456
- errata/RHSA-2026:26457
- errata/RHSA-2026:26458
- errata/RHSA-2026:26459
- errata/RHSA-2026:26460
- errata/RHSA-2026:26461
- errata/RHSA-2026:26463
- errata/RHSA-2026:26464
- errata/RHSA-2026:26465
- errata/RHSA-2026:26597
- errata/RHSA-2026:26599
- errata/RHSA-2026:26639
- errata/RHSA-2026:27125
- security/cve/CVE-2026-9064