Bug 2494827
| Summary: | CVE-2026-11793 389-ds-base: 389-ds-base: stack buffer overflow in checkPrefix() algorithm ID parsing [fedora-all] | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Samuele Negrini <snegrini> |
| Component: | 389-ds-base | Assignee: | Viktor Ashirov <vashirov> |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | rawhide | CC: | abokovoy, jachapma, mreynolds, spichugi, tbordaz, vashirov |
| Target Milestone: | --- | Keywords: | Security, SecurityTracking |
| Target Release: | --- | Flags: | fedora-admin-xmlrpc:
mirror+
|
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | {"flaws": ["ad51e0aa-3f34-43e6-b80c-934bae77e929"]} | ||
| Fixed In Version: | 389-ds-base-3.3.1-3.fc45 389-ds-base-3.1.5-4.fc43 389-ds-base-3.2.3-5.fc44 | Doc Type: | --- |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2026-09-25 00:16:06 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | |||
| Bug Blocks: | 2484914 | ||
This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle. Changing version to 45. FEDORA-2026-b16c9cbc0f (389-ds-base-3.2.3-2.fc44) has been submitted as an update to Fedora 44. https://bodhi.fedoraproject.org/updates/FEDORA-2026-b16c9cbc0f FEDORA-2026-c1e25a4642 has been pushed to the Fedora 45 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-c1e25a4642` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-c1e25a4642 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates. FEDORA-2026-b16c9cbc0f has been pushed to the Fedora 44 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-b16c9cbc0f` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-b16c9cbc0f See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates. FEDORA-2026-0b8bc362b1 has been pushed to the Fedora 43 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-0b8bc362b1` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-0b8bc362b1 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates. FEDORA-2026-b16c9cbc0f has been pushed to the Fedora 44 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-b16c9cbc0f` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-b16c9cbc0f See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates. FEDORA-2026-b16c9cbc0f has been pushed to the Fedora 44 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-b16c9cbc0f` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-b16c9cbc0f See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates. FEDORA-2026-0b8bc362b1 has been pushed to the Fedora 43 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-0b8bc362b1` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-0b8bc362b1 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates. FEDORA-2026-c1e25a4642 has been pushed to the Fedora 45 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-c1e25a4642` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-c1e25a4642 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates. FEDORA-2026-c1e25a4642 (389-ds-base-3.3.1-3.fc45) has been pushed to the Fedora 45 stable repository. If problem still persists, please make note of it in this bug report. FEDORA-2026-0b8bc362b1 (389-ds-base-3.1.5-4.fc43) has been pushed to the Fedora 43 stable repository. If problem still persists, please make note of it in this bug report. FEDORA-2026-b16c9cbc0f (389-ds-base-3.2.3-5.fc44) has been pushed to the Fedora 44 stable repository. If problem still persists, please make note of it in this bug report. |
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process. A stack buffer overflow exists in 389 Directory Server's checkPrefix() function (pw.c:440-466). When parsing reversible-encrypted attribute values in the format {SCHEME-<algid>}ciphertext, the algorithm ID is copied into a 256-byte stack buffer via memcpy with no bounds check on (end - delim). An attacker with Directory Manager privileges can crash ns-slapd by storing a crafted nsDS5ReplicaCredentials (or similar reversible-encrypted config attribute) with an oversized algorithm ID. FORTIFY_SOURCE (__memcpy_chk) aborts the process before overflow bytes are written, limiting impact to DoS (SIGABRT) only. Code execution is not possible on production builds. Production crashes confirmed on RHEL 7 (389-ds-base-1.3.11.1-5.el7_9) and Fedora 42 (389-ds-base-3.1.4-6.fc42). RHEL 8 crash confirmed via dse.ldif injection (389-ds-base-1.4.3.39-2.module_el8). Note: cn=config is local configuration and not replicated; triggering requires Directory Manager access on the target server. Advisory: 389-ds-campaign-2026-04/003-Stack-Overflow-checkPrefix/advisory.md. Source: PSIRTSUPT-7600 (Ian Murphy, Red Hat Product Security).