CVE-2016-3705

libxml2: stack overflow before detecting invalid XML file

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The (1) xmlParserEntityCheck and (2) xmlParseAttValueComplex functions in parser.c in libxml2 2.9.3 do not properly keep track of the recursion depth, which allows context-dependent attackers to cause a denial of service (stack consumption and application crash) via a crafted XML document containing a large number of nested entity references.

Las funciones (1) xmlParserEntityCheck y (2) xmlParseAttValueComplex en parser.c en libxml2 2.9.3 no hace seguimiento de manera adecuada de la profundidad de recursividad, lo que permite a atacantes dependientes del contexto provocar una denegación de servicio (consumo de pila y caída de la aplicación) a través de un documento XML manipulado que contiene un gran número de referencias de entidades anidadas.

Missing incrementation of recursion depth counter were found in the xmlParserEntityCheck() and xmlParseAttValueComplex() functions used for parsing XML data. An attacker could launch a Denial of Service attack by passing specially crafted XML data to an application, forcing it to crash due to stack exhaustion.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-03-30 CVE Reserved
2016-05-17 CVE Published
2023-07-10 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-674: Uncontrolled Recursion

CAPEC

References (18)

URL	Tag	Source
http://seclists.org/fulldisclosure/2016/May/10	Mailing List
http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html	X_refsource_confirm
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html	X_refsource_confirm
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html	X_refsource_confirm
http://www.securityfocus.com/bid/89854	Vdb Entry
https://bugzilla.gnome.org/show_bug.cgi?id=765207	X_refsource_confirm
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05157239	X_refsource_confirm
https://kc.mcafee.com/corporate/index?page=content&id=SB10170	X_refsource_confirm
https://www.tenable.com/security/tns-2016-18	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-updates/2016-05/msg00055.html	2023-02-12
http://lists.opensuse.org/opensuse-updates/2016-05/msg00127.html	2023-02-12
http://rhn.redhat.com/errata/RHSA-2016-2957.html	2023-02-12
http://www.ubuntu.com/usn/USN-2994-1	2023-02-12
https://access.redhat.com/errata/RHSA-2016:1292	2023-02-12
https://security.gentoo.org/glsa/201701-37	2023-02-12
https://www.debian.org/security/2016/dsa-3593	2023-02-12
https://access.redhat.com/security/cve/CVE-2016-3705	2016-12-15
https://bugzilla.redhat.com/show_bug.cgi?id=1332443	2016-12-15

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
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"		lts		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"		lts		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
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"		lts		Affected
Xmlsoft Search vendor "Xmlsoft"		Libxml2 Search vendor "Xmlsoft" for product "Libxml2"				2.9.3 Search vendor "Xmlsoft" for product "Libxml2" and version "2.9.3"		-		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
Hp Search vendor "Hp"		Icewall Federation Agent Search vendor "Hp" for product "Icewall Federation Agent"				3.0 Search vendor "Hp" for product "Icewall Federation Agent" and version "3.0"		-		Affected
Hp Search vendor "Hp"		Icewall File Manager Search vendor "Hp" for product "Icewall File Manager"				3.0 Search vendor "Hp" for product "Icewall File Manager" and version "3.0"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				42.1 Search vendor "Opensuse" for product "Leap" and version "42.1"		-		Affected