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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | samba | 2:3.3.6-1 | — |
| Debian 13 | samba | 2:3.3.6-1 | — |
| Debian 12 | samba | 2:3.3.6-1 | — |
| Debian 5.0 | samba | 2:3.2.5-4lenny6 | DSA-1823-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | libsmbclient +1 | 3.0.34-46.el5 | RHSA-2009:1585 |
| RHEL 5 | libtalloc +1 | 1.2.0-46.el5 | RHSA-2009:1585 |
| RHEL 5 | libtdb +2 | 1.1.2-46.el5 | RHSA-2009:1585 |
| RHEL 5 | samba +3 | 3.0.33-3.15.el5_4 | RHSA-2009:1529 |
| RHEL 5 | samba3x +7 | 3.3.8-0.46.el5 | RHSA-2009:1585 |
| RHEL 4 | samba +3 | 3.0.33-0.18.el4_8 | RHSA-2009:1529 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | cifs-utils | 6.5-1.5 | openSUSE-SU-2024:10334-1 |
| openSUSE Tumbleweed | samba | 4.5.0-1.1 | openSUSE-SU-2024:10069-1 |
Advisories 5
- RHSA-2009:1585 Red Hat Security Advisory: samba3x security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2009:1529 Red Hat Security Advisory: samba security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- DSA-1823-1 samba - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10069-1 ctdb-4.5.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10334-1 cifs-utils-6.5-1.5 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- ADV-2009-1664 vdb-entry
- DSA-1823 vendor-advisory
- http://www.samba.org/samba/ftp/patches/security/samba-3.2.12-CVE-2009-1888.patch
- http://www.samba.org/samba/security/CVE-2009-1888.html
- 20091112 rPSA-2009-0145-1 samba samba-client samba-server samba-swat mailing-list
- samba-acl-security-bypass(51327) vdb-entry
- 35573 third-party-advisory
- http://www.samba.org/samba/ftp/patches/security/samba-3.0.34-CVE-2009-1888.patch
- 35606 third-party-advisory
- SSA:2009-177-01 vendor-advisory
- 35472 vdb-entry
- oval:org.mitre.oval:def:7292 vdb-entry signature
- http://www.samba.org/samba/ftp/patches/security/samba-3.3.5-CVE-2009-1888.patch
- USN-839-1 vendor-advisory
- oval:org.mitre.oval:def:10790 vdb-entry signature
- 35539 third-party-advisory
- 36918 third-party-advisory
- MDVSA-2009:196 vendor-advisory
- http://wiki.rpath.com/Advisories:rPSA-2009-0145
- 1022442 vdb-entry