High
apache-directory-server — security advisory
While investigating DIRSTUDIO-1219 it was noticed that configured StartTLS encryption was not applied when any SASL authentication mechanism (DIGEST-MD5, GSSAPI) was used. While investigating DIRSTUDIO-1220 it was noticed that any configured SASL confidentiality layer was not applied. This issue affects Apache Directory Studio version 2.0.0.v20210213-M16 and prior versions.
- Products
- apache-directory-server
- Affected versions
- 2.0.0~M15-1, 2.0.0~M15-2, 2.0.0~M15-3, 2.0.0~M15-4, 2.0.0~M24-2~18.04, 2.0.0~M24-3, 2.0.0~M24-4, 2.0.0~M26-1, 2.0.0~M26-3, 2.0.0~M26-4, 2.0.0~M26-5, 2.0.0~M26-5build1, 2.0.0~M26-6, 2.0.0~M26-7
- Fixed versions
- Not specified
- CVEs
- CVE-2021-33900
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:59 UTC · Revision 1
Source evidence
While investigating DIRSTUDIO-1219 it was noticed that configured StartTLS encryption was not applied when any SASL authentication mechanism (DIGEST-MD5, GSSAPI) was used. While investigating DIRSTUDIO-1220 it was noticed that any configured SASL confidentiality layer was not applied. This issue affects Apache Directory Studio version 2.0.0.v20210213-M16 and prior versions.
osv:UBUNTU-CVE-2021-33900
apache-directory-server
Fixed versions: Not specified
apache-directory-server
Fixed versions: Not specified
apache-directory-server
Fixed versions: Not specified
apache-directory-server
Fixed versions: Not specified
apache-directory-server
Fixed versions: Not specified
apache-directory-server
Fixed versions: Not specified
apache-directory-server
Fixed versions: Not specified
apache-directory-server
Fixed versions: Not specified
Complete source record
{
"id": "c7a0931bda0e1778b692fc889b3eeec28819c184ed5e7f811d76ea1db37f1d1f",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-33900",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2021-33900",
"summary": "While investigating DIRSTUDIO-1219 it was noticed that configured StartTLS encryption was not applied when any SASL authentication mechanism (DIGEST-MD5, GSSAPI) was used. While investigating DIRSTUDIO-1220 it was noticed that any configured SASL confidentiality layer was not applied. This issue affects Apache Directory Studio version 2.0.0.v20210213-M16 and prior versions.",
"evidence": "osv:UBUNTU-CVE-2021-33900",
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"severity": "high",
"structured": {
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"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
},
{
"type": "Ubuntu",
"score": "low"
}
],
"affected": [
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],
"modified": "2026-10-17T12:56:19.937669403Z",
"provider": "osv",
"upstream": [
"CVE-2021-33900"
],
"references": [
"https://ubuntu.com/security/CVE-2021-33900",
"https://www.openwall.com/lists/oss-security/2021/07/24/1",
"https://lists.apache.org/thread.html/rb1dbcc43a5b406e45d335343a1704f4233de613140a01929d102fdc9%40%3Cusers.directory.apache.org%3E",
"https://www.cve.org/CVERecord?id=CVE-2021-33900"
]
},
"related_cves": [
{
"value": "CVE-2021-33900",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 355303,
"published_at": "2021-07-26T07:15:00+00:00"
}