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OVAL Definitions
>
OVAL Definition Details
Id
oval:com.altx-soft.nix:def:240216
[Rus]
Version
1
Class
patch
ALTXid
468415
Language
English
Severity
Critical
Title
ELSA-2023-7467 -- samba security update
Description
[4.18.6-2.0.1]
- resolves: RHEL-11937
Fix CVE-2023-3961 - smbd must check the pipename
- resolves: RHEL-11937
Fix CVE-2023-4091 - SMB clients can truncate files
- resolves: RHEL-11937
Fix CVE-2023-42669 - Remove rpcecho server
Family
unix
Platform
Oracle Linux 8
Product
samba
Reference
VENDOR: ELSA-2023-7467
VENDOR: ELSA-2023-7467
Id:
ELSA-2023-7467
Reference:
http://linux.oracle.com/errata/ELSA-2023-7467.html
CVE: CVE-2023-42669
CVE: CVE-2023-42669
Id:
CVE-2023-42669
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-42669
Comment
: 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.
CVSSv3 Score:
6.5
Attack vector:
NETWORK
Attack complexity:
LOW
Privileges required:
LOW
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References:
https://bugzilla.samba.org/show_bug.cgi?id=15474 (MISC)
https://www.samba.org/samba/security/CVE-2023-42669.html (MISC)
https://bugzilla.redhat.com/show_bug.cgi?id=2241884 (MISC)
https://access.redhat.com/security/cve/CVE-2023-42669 (MISC)
https://access.redhat.com/errata/RHSA-2023:6209 (MISC)
RHSA-2023:6744 ()
RHSA-2023:7371 ()
RHSA-2023:7408 ()
RHSA-2023:7464 ()
RHSA-2023:7467 ()
https://security.netapp.com/advisory/ntap-20231124-0002/ ()
CVE: CVE-2023-4091
CVE: CVE-2023-4091
Id:
CVE-2023-4091
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-4091
Comment
: A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS module "acl_xattr" is configured with "acl_xattr:ignore system acls = yes". The SMB protocol allows opening files when the client requests read-only access but then implicitly truncates the opened file to 0 bytes if the client specifies a separate OVERWRITE create disposition request. The issue arises in configurations that bypass kernel file system permissions checks, relying solely on Samba's permissions.
CVSSv3 Score:
6.5
Attack vector:
NETWORK
Attack complexity:
LOW
Privileges required:
LOW
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
NONE
Integrity impact:
HIGH
Availability impact:
NONE
CVSSv3 Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CWE:
276 (Incorrect Default Permissions)
References:
https://www.samba.org/samba/security/CVE-2023-4091.html (MISC)
https://bugzilla.samba.org/show_bug.cgi?id=15439 (MISC)
https://access.redhat.com/errata/RHSA-2023:6209 (MISC)
https://bugzilla.redhat.com/show_bug.cgi?id=2241882 (MISC)
https://access.redhat.com/security/cve/CVE-2023-4091 (MISC)
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I/ (MISC)
RHSA-2023:6744 ()
RHSA-2023:7371 ()
RHSA-2023:7408 ()
RHSA-2023:7464 ()
RHSA-2023:7467 ()
https://security.netapp.com/advisory/ntap-20231124-0002/ ()
https://lists.debian.org/debian-lts-announce/2024/04/msg00015.html ()
CVE: CVE-2023-3961
CVE: CVE-2023-3961
Id:
CVE-2023-3961
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-3961
Comment
: A path traversal vulnerability was identified in Samba when processing client pipe names connecting to Unix domain sockets within a private directory. Samba typically uses this mechanism to connect SMB clients to remote procedure call (RPC) services like SAMR LSA or SPOOLSS, which Samba initiates on demand. However, due to inadequate sanitization of incoming client pipe names, allowing a client to send a pipe name containing Unix directory traversal characters (../). This could result in SMB clients connecting as root to Unix domain sockets outside the private directory. If an attacker or client managed to send a pipe name resolving to an external service using an existing Unix domain socket, it could potentially lead to unauthorized access to the service and consequential adverse events, including compromise or service crashes.
CVSSv3 Score:
9.8
Attack vector:
NETWORK
Attack complexity:
LOW
Privileges required:
NONE
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE:
22 (Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'))
References:
https://bugzilla.samba.org/show_bug.cgi?id=15422 (MISC)
https://access.redhat.com/security/cve/CVE-2023-3961 (MISC)
https://access.redhat.com/errata/RHSA-2023:6209 (MISC)
https://bugzilla.redhat.com/show_bug.cgi?id=2241881 (MISC)
https://www.samba.org/samba/security/CVE-2023-3961.html (MISC)
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I/ (MISC)
RHSA-2023:6744 ()
RHSA-2023:7371 ()
RHSA-2023:7408 ()
RHSA-2023:7464 ()
RHSA-2023:7467 ()
https://security.netapp.com/advisory/ntap-20231124-0002/ ()
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