CVE-2019-3883
Connections using SSL/TLS are not taking this timeout into account during reads, and may hang longer.An unauthenticated attacker could repeatedly create hanging LDAP requests to hang all the workers, resulting in a Denial of Service.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (8.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In 389-ds-base up to version 1.4.1.2, requests are handled by workers threads. Each sockets will be waited by the worker for at most 'ioblocktimeout' seconds. However this timeout applies only for un-encrypted requests. Connections using SSL/TLS are not taking this timeout into account during reads, and may hang longer.An unauthenticated attacker could repeatedly create hanging LDAP requests to hang all the workers, resulting in a Denial of Service.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 8.43% probability · 95th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-772
- Affected
- fedoraproject/389 directory server · debian/debian linux · redhat/enterprise linux
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2019:1896Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3401Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3883Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/05/msg00008.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00026.html
- https://pagure.io/389-ds-base/issue/50329Issue Tracking, Third Party Advisory
- https://pagure.io/389-ds-base/pull-request/50331Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1896Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3401Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3883Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/05/msg00008.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00026.html
- https://pagure.io/389-ds-base/issue/50329Issue Tracking, Third Party Advisory
- https://pagure.io/389-ds-base/pull-request/50331Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.