CVE-2015-5252

high-risk
Published 2015-12-29

vfs.c in smbd in Samba 3.x and 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3, when share names with certain substring relationships exist, allows remote attackers to bypass intended file-access restrictions via a symlink that points outside of a share.

Do I need to act?

!
17.3% chance of exploitation in next 30 days
EPSS score — higher than 83% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.2/10 High
NETWORK / LOW complexity

Affected Products (7)

Affected Vendors

Debian Samba Canonical

References (48)

Third Party Advisory http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.h...
Third Party Advisory http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.h...
Mailing List http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00032.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00002.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00017.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00046.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
Third Party Advisory http://www.debian.org/security/2016/dsa-3433
Third Party Advisory http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
Third Party Advisory http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.h...
Third Party Advisory http://www.securityfocus.com/bid/79733
Third Party Advisory http://www.securitytracker.com/id/1034493
Third Party Advisory http://www.ubuntu.com/usn/USN-2855-1
Third Party Advisory http://www.ubuntu.com/usn/USN-2855-2
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1290288
and 28 more references
53
/ 100
high-risk
Severity 26/34 · High
Exploitability 13/34 · Low
Exposure 14/34 · Moderate