CVE Vulnerability

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).

7.8 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 6.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/libexpat/libexpat/issues/186 Issue Tracking Patch
https://github.com/libexpat/libexpat/pull/262 Exploit Patch
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5226 Issue Tracking Third Party Advisory
https://github.com/libexpat/libexpat/pull/262/commits/11f8838bf99ea0a6f0b76f9760c43704d00c4ff6 Patch Third Party Advisory
https://github.com/libexpat/libexpat/blob/R_2_2_7/expat/Changes Release Notes Third Party Advisory
https://usn.ubuntu.com/4040-1/ Third Party Advisory
https://usn.ubuntu.com/4040-2/ Third Party Advisory
https://seclists.org/bugtraq/2019/Jun/39 Mailing List Third Party Advisory
https://www.debian.org/security/2019/dsa-4472 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/06/msg00028.html Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20190703-0001/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CEJJSQSG3KSUQY4FPVHZ7ZTT7FORMFVD/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IDAUGEB3TUP6NEKJDBUBZX7N5OAUOOOK/ Mailing List Third Party Advisory
https://support.f5.com/csp/article/K51011533 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00039.html Mailing List Third Party Advisory
https://security.gentoo.org/glsa/201911-08 Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2020.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2020.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.html Patch Third Party Advisory
https://www.tenable.com/security/tns-2021-11 Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:http_server:12.1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:outside_in_technology:8.5.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:outside_in_technology:8.5.5:*:*:*:*:*:*:*
cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:hospitality_res_3700:*:*:*:*:*:*:*:*
cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:*
Information

Published : 2019-06-24 05:15

Updated : 2022-04-18 05:17

NVD link : CVE-2018-20843

Mitre link : CVE-2018-20843

Products Affected
No products.
CWE
CWE-611

Improper Restriction of XML External Entity Reference