CVE-2015-5252

samba: Insufficient symlink verification in smbd

Severity Score

7.2

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

vfs.c en smbd en Samba 3.x y 4.x en versiones anteriores a 4.1.22, 4.2.x en versiones anteriores a 4.2.7 y 4.3.x en versiones anteriores a 4.3.3, cuando existen nombres de recursos compartidos con ciertas relaciones de subcadenas, permite a atacantes remotos eludir las restricciones de acceso a archivos destinadas a través de un enlace simbólico que apunta fuera de un recurso compartido.

An access flaw was found in the way Samba verified symbolic links when creating new files on a Samba share. A remote attacker could exploit this flaw to gain access to files outside of Samba's share path.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-07-01 CVE Reserved
2015-12-29 CVE Published
2023-11-22 EPSS Updated
2024-08-06 CVE Updated
2024-08-06 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-41: Improper Resolution of Path Equivalence
CWE-264: Permissions, Privileges, and Access Controls

CAPEC

References (25)

URL	Tag	Source
http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html	Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html	Third Party Advisory
http://www.securityfocus.com/bid/79733	Third Party Advisory
http://www.securitytracker.com/id/1034493	Third Party Advisory
https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=4278ef25f64d5fdbf432ff1534e275416ec9561e	X_refsource_confirm
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05115993	Third Party Advisory

URL	Date	SRC
https://www.samba.org/samba/security/CVE-2015-5252.html	2024-08-06

URL	Date	SRC

URL	Date	SRC
http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.html	2023-11-07
http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00032.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00002.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00017.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00046.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html	2023-11-07
http://www.debian.org/security/2016/dsa-3433	2023-11-07
http://www.ubuntu.com/usn/USN-2855-1	2023-11-07
http://www.ubuntu.com/usn/USN-2855-2	2023-11-07
https://bugzilla.redhat.com/show_bug.cgi?id=1290288	2016-01-08
https://security.gentoo.org/glsa/201612-47	2023-11-07
https://access.redhat.com/security/cve/CVE-2015-5252	2016-01-08

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Samba Search vendor "Samba"		Samba Search vendor "Samba" for product "Samba"				>= 3.0.0 < 4.1.22 Search vendor "Samba" for product "Samba" and version " >= 3.0.0 < 4.1.22"		-		Affected
Samba Search vendor "Samba"		Samba Search vendor "Samba" for product "Samba"				>= 4.2.0 < 4.2.7 Search vendor "Samba" for product "Samba" and version " >= 4.2.0 < 4.2.7"		-		Affected
Samba Search vendor "Samba"		Samba Search vendor "Samba" for product "Samba"				>= 4.3.0 < 4.3.3 Search vendor "Samba" for product "Samba" and version " >= 4.3.0 < 4.3.3"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"		esm		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				15.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "15.04"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				15.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "15.10"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				7.0 Search vendor "Debian" for product "Debian Linux" and version "7.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected