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Vulnerability Details : CVE-2018-20843

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).
Publish Date : 2019-06-24 Last Update Date : 2019-06-26
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- CVSS Scores & Vulnerability Types

CVSS Score
7.8
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 611

- Products Affected By CVE-2018-20843

# Product Type Vendor Product Version Update Edition Language
1 Application Libexpat Expat - Version Details Vulnerabilities
2 Application Libexpat Expat 1.95.0 Version Details Vulnerabilities
3 Application Libexpat Expat 1.95.1 Version Details Vulnerabilities
4 Application Libexpat Expat 1.95.2 Version Details Vulnerabilities
5 Application Libexpat Expat 1.95.3 Version Details Vulnerabilities
6 Application Libexpat Expat 1.95.4 Version Details Vulnerabilities
7 Application Libexpat Expat 1.95.5 Version Details Vulnerabilities
8 Application Libexpat Expat 1.95.6 Version Details Vulnerabilities
9 Application Libexpat Expat 1.95.7 Version Details Vulnerabilities
10 Application Libexpat Expat 1.95.8 Version Details Vulnerabilities
11 Application Libexpat Expat 2.0.0 Version Details Vulnerabilities
12 Application Libexpat Expat 2.0.1 Version Details Vulnerabilities
13 Application Libexpat Expat 2.1.0 Version Details Vulnerabilities
14 Application Libexpat Expat 2.1.1 Version Details Vulnerabilities
15 Application Libexpat Expat 2.2.0 Version Details Vulnerabilities
16 Application Libexpat Expat 2.2.1 Version Details Vulnerabilities
17 Application Libexpat Expat 2.2.2 Version Details Vulnerabilities
18 Application Libexpat Expat 2.2.3 Version Details Vulnerabilities
19 Application Libexpat Expat 2.2.4 Version Details Vulnerabilities
20 Application Libexpat Expat 2.2.5 Version Details Vulnerabilities
21 Application Libexpat Expat 2.2.6 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Libexpat Expat 21

- References For CVE-2018-20843

https://usn.ubuntu.com/4040-1/
UBUNTU USN-4040-1
https://github.com/libexpat/libexpat/pull/262
https://lists.debian.org/debian-lts-announce/2019/06/msg00028.html
MLIST [debian-lts-announce] 20190629 [SECURITY] [DLA 1839-1] expat security update
https://www.debian.org/security/2019/dsa-4472
DEBIAN DSA-4472
https://usn.ubuntu.com/4040-2/
UBUNTU USN-4040-2
https://security.netapp.com/advisory/ntap-20190703-0001/ CONFIRM
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5226
https://github.com/libexpat/libexpat/blob/R_2_2_7/expat/Changes
https://github.com/libexpat/libexpat/pull/262/commits/11f8838bf99ea0a6f0b76f9760c43704d00c4ff6
https://seclists.org/bugtraq/2019/Jun/39
BUGTRAQ 20190628 [SECURITY] [DSA 4472-1] expat security update
https://github.com/libexpat/libexpat/issues/186

- Metasploit Modules Related To CVE-2018-20843

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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