CVE-2022-25313

expat: Stack exhaustion in doctype parsing

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In Expat (aka libexpat) before 2.4.5, an attacker can trigger stack exhaustion in build_model via a large nesting depth in the DTD element.

En Expat (también se conoce como libexpat) versiones anteriores a 2.4.5, un atacante puede desencadenar un agotamiento de pila en build_model por medio de una gran profundidad de anidamiento en el elemento DTD

A flaw was found in expat. A stack exhaustion in doctype parsing could be triggered by a file with a large number of opening braces, resulting in a denial of service.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

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

2022-02-18 CVE Reserved
2022-02-18 CVE Published
2022-05-11 First Exploit
2024-08-03 CVE Updated
2024-11-03 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-674: Uncontrolled Recursion
CWE-770: Allocation of Resources Without Limits or Throttling

CAPEC

References (14)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2022/02/19/1	Mailing List
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf	Third Party Advisory
https://github.com/libexpat/libexpat/pull/558	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00007.html	Mailing List
https://security.netapp.com/advisory/ntap-20220303-0008	Third Party Advisory

URL	Date	SRC
https://github.com/Trinadh465/external_expat-2.1.0_CVE-2022-25313	2023-04-12
https://github.com/ShaikUsaf/external_expact_AOSP10_r33_CVE-2022-25313	2022-05-11

URL	Date	SRC
https://www.oracle.com/security-alerts/cpuapr2022.html	2023-11-07

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3UFRBA3UQVIQKXTBUQXDWQOVWNBKLERU	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y27XO3JMKAOMQZVPS3B4MJGEAHCZF5OM	2023-11-07
https://security.gentoo.org/glsa/202209-24	2023-11-07
https://www.debian.org/security/2022/dsa-5085	2023-11-07
https://access.redhat.com/security/cve/CVE-2022-25313	2022-11-08
https://bugzilla.redhat.com/show_bug.cgi?id=2056350	2022-11-08

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Libexpat Project Search vendor "Libexpat Project"		Libexpat Search vendor "Libexpat Project" for product "Libexpat"				< 2.4.5 Search vendor "Libexpat Project" for product "Libexpat" and version " < 2.4.5"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				35 Search vendor "Fedoraproject" for product "Fedora" and version "35"		-		Affected
Oracle Search vendor "Oracle"		Http Server Search vendor "Oracle" for product "Http Server"				12.2.1.3.0 Search vendor "Oracle" for product "Http Server" and version "12.2.1.3.0"		-		Affected
Oracle Search vendor "Oracle"		Http Server Search vendor "Oracle" for product "Http Server"				12.2.1.4.0 Search vendor "Oracle" for product "Http Server" and version "12.2.1.4.0"		-		Affected
Oracle Search vendor "Oracle"		Zfs Storage Appliance Kit Search vendor "Oracle" for product "Zfs Storage Appliance Kit"				8.8 Search vendor "Oracle" for product "Zfs Storage Appliance Kit" and version "8.8"		-		Affected
Siemens Search vendor "Siemens"		Sinema Remote Connect Server Search vendor "Siemens" for product "Sinema Remote Connect Server"				< 3.1 Search vendor "Siemens" for product "Sinema Remote Connect Server" and version " < 3.1"		-		Affected