Medium severity6.5OSV Advisory· Published Nov 6, 2023· Updated Jun 17, 2026
CVE-2023-42669
CVE-2023-42669
Description
A vulnerability was found in Samba's "rpcecho" development server, a non-Windows RPC server used to test Samba's DCE/RPC stack elements. This vulnerability stems from an RPC function that can be blocked indefinitely. The issue arises because the "rpcecho" service operates with only one worker in the main RPC task, allowing calls to the "rpcecho" server to be blocked for a specified time, causing service disruptions. This disruption is triggered by a "sleep()" call in the "dcesrv_echo_TestSleep()" function under specific conditions. Authenticated users or attackers can exploit this vulnerability to make calls to the "rpcecho" server, requesting it to block for a specified duration, effectively disrupting most services and leading to a complete denial of service on the AD DC. The DoS affects all other services as "rpcecho" runs in the main RPC task.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
65ldb-1.1.0, ldb-1.1.10, ldb-1.1.11, …+ 1 more
- (no CPE)range: ldb-1.1.0, ldb-1.1.10, ldb-1.1.11, …
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*range: >=4.0.0,<4.17.12
- osv-coords54 versionspkg:deb/ubuntu/samba@2:4.18.6+dfsg-1ubuntu2.1?arch=source&distro=manticpkg:rpm/opensuse/samba&distro=openSUSE%20Tumbleweedpkg:rpm/almalinux/samba-winexepkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Micro%205.5pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP5pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Micro%205.3pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Micro%205.4pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP3pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-ESPOSpkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/samba&distro=SUSE%20Manager%20Proxy%204.2pkg:rpm/suse/samba&distro=SUSE%20Manager%20Server%204.2pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/samba&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/almalinux/ctdbpkg:rpm/almalinux/libnetapipkg:rpm/almalinux/libnetapi-develpkg:rpm/almalinux/libsmbclientpkg:rpm/almalinux/libsmbclient-develpkg:rpm/almalinux/libwbclientpkg:rpm/almalinux/libwbclient-develpkg:rpm/almalinux/python3-sambapkg:rpm/almalinux/python3-samba-dcpkg:rpm/almalinux/python3-samba-develpkg:rpm/almalinux/python3-samba-testpkg:rpm/almalinux/sambapkg:rpm/almalinux/samba-clientpkg:rpm/almalinux/samba-client-libspkg:rpm/almalinux/samba-commonpkg:rpm/almalinux/samba-common-libspkg:rpm/almalinux/samba-common-toolspkg:rpm/almalinux/samba-dc-libspkg:rpm/almalinux/samba-dcerpcpkg:rpm/almalinux/samba-develpkg:rpm/almalinux/samba-krb5-printingpkg:rpm/almalinux/samba-ldb-ldap-modulespkg:rpm/almalinux/samba-libspkg:rpm/almalinux/samba-pidlpkg:rpm/almalinux/samba-testpkg:rpm/almalinux/samba-test-libspkg:rpm/almalinux/samba-toolspkg:rpm/almalinux/samba-usersharespkg:rpm/almalinux/samba-vfs-iouringpkg:rpm/almalinux/samba-winbindpkg:rpm/almalinux/samba-winbind-clientspkg:rpm/almalinux/samba-winbind-krb5-locatorpkg:rpm/almalinux/samba-winbind-modulespkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP5pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP4pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP4pkg:rpm/opensuse/samba&distro=openSUSE%20Leap%2015.5pkg:rpm/opensuse/samba&distro=openSUSE%20Leap%2015.4
< 2:4.18.6+dfsg-1ubuntu2.1+ 53 more
- (no CPE)range: < 2:4.18.6+dfsg-1ubuntu2.1
- (no CPE)range: < 4.19.1+git.312.c912b3d2ef6-1.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.17.9+git.421.abde31ca5c2-150500.3.11.1
- (no CPE)range: < 4.17.9+git.421.abde31ca5c2-150500.3.11.1
- (no CPE)range: < 4.15.13+git.691.3d3cea0641-150400.3.31.1
- (no CPE)range: < 4.15.13+git.691.3d3cea0641-150400.3.31.1
- (no CPE)range: < 4.15.13+git.691.3d3cea0641-150300.3.63.1
- (no CPE)range: < 4.15.13+git.691.3d3cea0641-150300.3.63.1
- (no CPE)range: < 4.15.13+git.691.3d3cea0641-150300.3.63.1
- (no CPE)range: < 4.15.13+git.691.3d3cea0641-150300.3.63.1
- (no CPE)range: < 4.15.13+git.691.3d3cea0641-150300.3.63.1
- (no CPE)range: < 4.15.13+git.691.3d3cea0641-150300.3.63.1
- (no CPE)range: < 4.15.13+git.691.3d3cea0641-150300.3.63.1
- (no CPE)range: < 4.15.13+git.691.3d3cea0641-150300.3.63.1
- (no CPE)range: < 4.15.13+git.691.3d3cea0641-150300.3.63.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.18.6-101.el9_3.alma.1
- (no CPE)range: < 4.17.9+git.421.abde31ca5c2-150500.3.11.1
- (no CPE)range: < 4.15.13+git.691.3d3cea0641-150400.3.31.1
- (no CPE)range: < 4.15.13+git.691.3d3cea0641-150400.3.31.1
- (no CPE)range: < 4.17.9+git.421.abde31ca5c2-150500.3.11.1
- (no CPE)range: < 4.15.13+git.691.3d3cea0641-150400.3.31.1
- cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.0_ppc64le:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_eus:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:9.0_s390x:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:9.0_s390x:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:9.0_ppc64le:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
11- access.redhat.com/errata/RHSA-2023:6209nvdThird Party Advisory
- access.redhat.com/errata/RHSA-2023:6744nvdThird Party Advisory
- access.redhat.com/security/cve/CVE-2023-42669nvdThird Party Advisory
- www.samba.org/samba/security/CVE-2023-42669.htmlnvdVendor Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue Tracking
- bugzilla.samba.org/show_bug.cginvdIssue Tracking
- access.redhat.com/errata/RHSA-2023:7371nvd
- access.redhat.com/errata/RHSA-2023:7408nvd
- access.redhat.com/errata/RHSA-2023:7464nvd
- access.redhat.com/errata/RHSA-2023:7467nvd
- security.netapp.com/advisory/ntap-20231124-0002/nvd
News mentions
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