Medium
389-ds-base — security advisory
A stack buffer overflow flaw was found in 389 Directory Server. The checkPrefix() function in pw.c copies an attacker-controlled algorithm ID into a 256-byte stack buffer without bounds checking when parsing reversible-encrypted attribute values. An attacker with Directory Manager privileges can crash the LDAP server by storing a crafted credential with an oversized algorithm ID. FORTIFY_SOURCE mitigates this to denial of service only.
- Products
- 389-ds-base
- Affected versions
- 1.3.3.12-1build1, 1.3.3.13-1, 1.3.4.5-2, 1.3.4.8-1, 1.3.4.8-3, 1.3.4.8-3ubuntu1, 1.3.4.8-4, 1.3.4.9-1, 1.3.4.9-1ubuntu0.1~esm1, 1.3.7.10-1, 1.3.7.10-1ubuntu1, 1.3.7.10-1ubuntu1+esm1, 1.3.7.5-1, 1.3.7.5-1build1, 1.3.7.5-1build2, 1.3.7.9-1, 1.4.1.6-4, 1.4.1.6-4build1, 1.4.2.4-1, 1.4.2.4-1build1, 1.4.3.2-1, 1.4.3.2-1build1, 1.4.3.6-2, 1.4.3.6-2ubuntu0.1~esm1, 1.4.4.11-2build1, 1.4.4.11-2build2, 1.4.4.17-1, 2.0.11-2, 2.0.14-1, 2.0.15-1, 2.0.15-1ubuntu2, 2.3.4+dfsg1-1, 2.4.4+dfsg1-1ubuntu1, 2.4.4+dfsg1-1ubuntu4, 2.4.4+dfsg1-3, 2.4.5+dfsg1-1, 3.1.2+dfsg1-1, 3.1.2+vendor1-2, 3.1.2+vendor1-2build1, 3.3.1-3
- Fixed versions
- Not specified
- CVEs
- CVE-2026-11793
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:02 UTC · Revision 1
Source evidence
A stack buffer overflow flaw was found in 389 Directory Server. The checkPrefix() function in pw.c copies an attacker-controlled algorithm ID into a 256-byte stack buffer without bounds checking when parsing reversible-encrypted attribute values. An attacker with Directory Manager privileges can crash the LDAP server by storing a crafted credential with an oversized algorithm ID. FORTIFY_SOURCE mitigates this to denial of service only.
osv:UBUNTU-CVE-2026-11793
389-ds-base
Fixed versions: Not specified
389-ds-base
Fixed versions: Not specified
389-ds-base
Fixed versions: Not specified
389-ds-base
Fixed versions: Not specified
389-ds-base
Fixed versions: Not specified
389-ds-base
Fixed versions: Not specified
389-ds-base
Fixed versions: Not specified
389-ds-base
Fixed versions: Not specified
Complete source record
{
"id": "c66901358d55f50f48f44dc8078abcd620a216e8edd9f8a8f14d93b9baf9f202",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-11793",
"method": "structured",
"payload": {
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"title": "UBUNTU-CVE-2026-11793",
"summary": "A stack buffer overflow flaw was found in 389 Directory Server. The checkPrefix() function in pw.c copies an attacker-controlled algorithm ID into a 256-byte stack buffer without bounds checking when parsing reversible-encrypted attribute values. An attacker with Directory Manager privileges can crash the LDAP server by storing a crafted credential with an oversized algorithm ID. FORTIFY_SOURCE mitigates this to denial of service only.",
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],
"modified": "2026-10-17T12:58:04.643368154Z",
"provider": "osv",
"upstream": [
"CVE-2026-11793"
],
"references": [
"https://ubuntu.com/security/CVE-2026-11793",
"https://www.cve.org/CVERecord?id=CVE-2026-11793",
"https://bugzilla.redhat.com/show_bug.cgi?id=2484914",
"https://access.redhat.com/security/cve/CVE-2026-11793",
"https://redhat.atlassian.net/browse/PSIRTSUPT-7600"
]
},
"related_cves": [
{
"value": "CVE-2026-11793",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 357957,
"published_at": "2026-06-09T14:16:00+00:00"
}