389-ds-base: DoS via hanging secured connections
Published Apr 17, 2019
7.5
HIGHCVSS 3.1
EPSS 8.20%
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.
Affected products
-
- Version affects up to 1.4.1.2StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Red Hat | 389-DS-Base | n/a |
|
Configuration 1
- ≤ 1.4.1.2
Configuration 2
- 8.0
Configuration 3
- 6.0
No data.
Red Hat Enterprise Linux 7
389-ds-base-0:1.3.8.4-25.1.el7_6
Fixed · RHSA-2019:1896
Red Hat Enterprise Linux 8
389-ds:1.4-8010020190903200205.eb48df33
Fixed · RHSA-2019:3401
Red Hat Enterprise Linux 6
389-ds-base
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | 389-ds-base-0:1.3.8.4-25.1.el7_6 | Fixed | RHSA-2019:1896 |
| Red Hat Enterprise Linux 8 | 389-ds:1.4-8010020190903200205.eb48df33 | Fixed | RHSA-2019:3401 |
| Red Hat Enterprise Linux 6 | 389-ds-base | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (22 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 8.20% (0.08202) | 94.71th | v5 (v2026.06.15) |
| Jun 15, 2026 | 8.43% (0.08426) | 94.27th | v5 (v2026.06.15) |
| Nov 21, 2025 | 0.40% (0.00401) | 60.06th | v4 (v2025.03.14) |
| Nov 18, 2025 | 18.42% (0.18418) | 94.76th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.34% (0.00335) | 54.14th | v4 (v2025.03.14) |
| Jan 30, 2025 | 4.38% (0.04379) | 92.36th | v3 (v2023.03.01) |
| Dec 4, 2024 | 5.46% (0.05465) | 93.44th | v3 (v2023.03.01) |
| Sep 7, 2024 | 4.30% (0.04302) | 92.50th | v3 (v2023.03.01) |
| Jun 21, 2024 | 5.97% (0.05968) | 93.51th | v3 (v2023.03.01) |
| Apr 10, 2024 | 8.20% (0.08203) | 94.25th | v3 (v2023.03.01) |
| Aug 11, 2023 | 9.74% (0.09742) | 94.05th | v3 (v2023.03.01) |
| May 8, 2023 | 13.09% (0.13086) | 94.66th | v3 (v2023.03.01) |
| Apr 24, 2023 | 21.75% (0.21745) | 95.72th | v3 (v2023.03.01) |
| Apr 23, 2023 | 43.87% (0.43873) | 96.80th | v3 (v2023.03.01) |
| Mar 7, 2023 | 44.78% (0.44776) | 96.77th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.11% (0.01108) | 55.18th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.11% (0.01108) | 51.54th | v2 (v2022.01.01) |
| Feb 4, 2022 | 8.93% (0.08934) | 82.99th | v2 (v2022.01.01) |
| Feb 3, 2022 | 7.62% (0.07623) | 84.03th | v5 (v2026.06.15) |
| Jan 6, 2022 | 7.62% (0.07623) | 83.88th | v1 |
| Sep 1, 2021 | 1.81% (0.01806) | 74.37th | v1 |
| Apr 14, 2021 | 1.81% (0.01806) | 0.00th | v1 |
References (11)
- https://access.redhat.com/errata/RHSA-2019:1896 vendor-advisoryThird Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3401 vendor-advisoryThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2019-3883 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1693612 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3883 Issue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/05/msg00008.html mailing-listMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00026.html mailing-list
- https://nvd.nist.gov/vuln/detail/CVE-2019-3883
- https://pagure.io/389-ds-base/issue/50329 Issue TrackingThird Party Advisory
- https://pagure.io/389-ds-base/pull-request/50331 Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2019-3883
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2019:1896 | vendor-advisoryThird Party Advisory | |
| https://access.redhat.com/errata/RHSA-2019:3401 | vendor-advisoryThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2019-3883 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1693612 | Issue Tracking | |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3883 | Issue TrackingThird Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2019/05/msg00008.html | mailing-listMailing ListThird Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2023/04/msg00026.html | mailing-list | |
| https://nvd.nist.gov/vuln/detail/CVE-2019-3883 | ||
| https://pagure.io/389-ds-base/issue/50329 | Issue TrackingThird Party Advisory | |
| https://pagure.io/389-ds-base/pull-request/50331 | Third Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2019-3883 |
Change history (0)
No recorded changes yet.