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CVE-2007-4138

19
FAUCET Score

CVE-2007-4138 describes a privilege escalation vulnerability in Samba versions 3.0.25 through 3.0.25c. When the "winbind nss info" option is set to rfc2307 or sfu and the primary group attribute is undefined, all local users can gain root privileges (gid 0). This vulnerability has a CVSS score of 6.9, indicating high severity due to its local attack vector, medium attack complexity, and complete impact on confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.0.25CPE matchmatch criteria
cpe:2.3:a:samba:samba:3.0.25:*:*:*:*:*:*:*
3.0.25aCPE matchmatch criteria
cpe:2.3:a:samba:samba:3.0.25a:*:*:*:*:*:*:*
3.0.25bCPE matchmatch criteria
cpe:2.3:a:samba:samba:3.0.25b:*:*:*:*:*:*:*
3.0.25cCPE matchmatch criteria
cpe:2.3:a:samba:samba:3.0.25c:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.9MEDIUM

AV:L/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
3.4
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.72%
Probability of exploitation in next 30 days
EPSS Percentile
50.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0072 is in the 85th percentile among its peer group of 1,595 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: samba-0:3.0.25b-1.el4_6.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: samba-0:3.0.25b-1.el5_1.2
View patch

Vendor Advisories (1)

redhatCVE-2007-4138Moderate

samba incorrect primary group assignment for domain users using the rfc2307 or sfu winbind nss info plugin

Sep 11, 2007

References

docs.info.apple.com / article.html
secunia.com / advisories/26764
PatchVendor Advisory
secunia.com / advisories/26776
secunia.com / advisories/26795
secunia.com / advisories/26834
securityreason.com / securityalert/3135
exchange.xforce.ibmcloud.com / vulnerabilities/36560
issues.rpath.com / browse/RPL-1705
slackware.com / security/viewer.php
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10375
redhat.com / archives/fedora-package-announce/2007-September/msg00201.html
redhat.com / support/errata/RHSA-2007-1016.html
redhat.com / support/errata/RHSA-2007-1017.html
samba.org / samba/security/CVE-2007-4138.html
securityfocus.com / archive/1/479078/100/0/threaded
securityfocus.com / bid/25636
Patch
securitytracker.com / id
us-cert.gov / cas/techalerts/TA07-352A.html
US Government Resource
vupen.com / english/advisories/2007/3120