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Mend.io Vulnerability Database

CVE-2018-20843

Date: June 24, 2019

In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).

Language: C

Severity Score

7.5

Related Resources (26)

Url: https://www.oracle.com/security-alerts/cpuapr2020.html

Url: https://www.oracle.com/security-alerts/cpuApr2021.html

Url: https://www.oracle.com/security-alerts/cpuoct2020.html

Url: https://github.com/libexpat/libexpat/issues/186

Url: https://github.com/libexpat/libexpat/blob/R_2_2_7/expat/Changes

Url: https://security.gentoo.org/glsa/201911-08

Url: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5226

Url: https://security.netapp.com/advisory/ntap-20190703-0001/

Url: https://github.com/libexpat/libexpat/pull/262

Url: https://usn.ubuntu.com/4040-2/

Url: https://support.f5.com/csp/article/K51011533

Url: https://www.oracle.com/security-alerts/cpuoct2021.html

Url: http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00039.html

Url: https://access.redhat.com/security/cve/CVE-2018-20843

Url: https://www.debian.org/security/2019/dsa-4472

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IDAUGEB3TUP6NEKJDBUBZX7N5OAUOOOK/

Url: https://github.com/libexpat/libexpat/pull/262/commits/11f8838bf99ea0a6f0b76f9760c43704d00c4ff6

Url: https://www.tenable.com/security/tns-2021-11

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CEJJSQSG3KSUQY4FPVHZ7ZTT7FORMFVD/

Url: https://lists.debian.org/debian-lts-announce/2019/06/msg00028.html

Url: https://security-tracker.debian.org/tracker/CVE-2018-20843

Url: https://usn.ubuntu.com/4040-1/

Url: https://seclists.org/bugtraq/2019/Jun/39

Url: https://nvd.nist.gov/vuln/detail/CVE-2018-20843

Url: https://security.alpinelinux.org/vuln/CVE-2018-20843

Url: https://www.mend.io/vulnerability-database/CVE-2018-20843

Severity Score

7.5

Weakness Type (CWE)

Improper Restriction of XML External Entity Reference

CWE-611

CVSS v3.1

Base Score:	7.5
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	HIGH

CVSS v2

Base Score:	7.8
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	COMPLETE
Additional information:

Mend.io Vulnerability Database

We found results for “”

CVE-2018-20843

Date: June 24, 2019

Language: C

Severity Score

Related Resources (26)

Severity Score

Weakness Type (CWE)

CVSS v3.1

CVSS v2

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