CVE-2009-1888

Severity: medium (CVSS 5.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-06-25 · updated 2026-06-16
Weakness: CWE-264

Description

The acl_group_override function in smbd/posix_acls.c in smbd in Samba 3.0.x before 3.0.35, 3.1.x and 3.2.x before 3.2.13, and 3.3.x before 3.3.6, when dos filemode is enabled, allows remote attackers to modify access control lists for files via vectors related to read access to uninitialized memory.

Affected products

Canonical Ubuntu Linux: 6.06, 8.04, 8.10, 9.04
Debian Linux: 4.0, 5.0
Samba: from 3.0.31 through 3.0.35; from 3.2.0 before 3.2.13; from 3.3.0 before 3.3.6 — fixed in 3.2.13, 3.3.6

How to fix

Upgrade to a fixed version: Samba 3.2.13, 3.3.6. Check the vendor advisory for mitigations.

References

http://secunia.com/advisories/35539
http://secunia.com/advisories/35573
http://secunia.com/advisories/35606
http://secunia.com/advisories/36918
http://wiki.rpath.com/Advisories:rPSA-2009-0145
http://www.debian.org/security/2009/dsa-1823
http://www.mandriva.com/security/advisories?name=MDVSA-2009:196
http://www.samba.org/samba/ftp/patches/security/samba-3.0.34-CVE-2009-1888.patch
http://www.samba.org/samba/ftp/patches/security/samba-3.2.12-CVE-2009-1888.patch
http://www.samba.org/samba/ftp/patches/security/samba-3.3.5-CVE-2009-1888.patch
http://www.samba.org/samba/security/CVE-2009-1888.html
http://www.securityfocus.com/archive/1/507856/100/0/threaded

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