CVE-2018-20843

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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).

7.5 /10

CVSS v3 : 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

7.8 /10

CVSS v2.0 : HIGH

V2 Legend

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:C

Exploitability : 10.0 / Impact : 6.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

References
Link Resource
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00039.html Mailing List Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5226 Issue Tracking Third Party Advisory
https://github.com/libexpat/libexpat/blob/R_2_2_7/expat/Changes Release Notes Third Party Advisory
https://github.com/libexpat/libexpat/issues/186 Issue Tracking Patch Third Party Advisory
https://github.com/libexpat/libexpat/pull/262 Exploit Patch Third Party Advisory
https://github.com/libexpat/libexpat/pull/262/commits/11f8838bf99ea0a6f0b76f9760c43704d00c4ff6 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/06/msg00028.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CEJJSQSG3KSUQY4FPVHZ7ZTT7FORMFVD/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IDAUGEB3TUP6NEKJDBUBZX7N5OAUOOOK/
https://seclists.org/bugtraq/2019/Jun/39 Mailing List Third Party Advisory
https://security.gentoo.org/glsa/201911-08 Third Party Advisory
https://security.netapp.com/advisory/ntap-20190703-0001/ Third Party Advisory
https://support.f5.com/csp/article/K51011533 Third Party Advisory
https://usn.ubuntu.com/4040-1/ Third Party Advisory
https://usn.ubuntu.com/4040-2/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4472 Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.html Patch 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/cpuoct2021.html Patch Third Party Advisory
https://www.tenable.com/security/tns-2021-11 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00039.html Mailing List Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5226 Issue Tracking Third Party Advisory
https://github.com/libexpat/libexpat/blob/R_2_2_7/expat/Changes Release Notes Third Party Advisory
https://github.com/libexpat/libexpat/issues/186 Issue Tracking Patch Third Party Advisory
https://github.com/libexpat/libexpat/pull/262 Exploit Patch Third Party Advisory
https://github.com/libexpat/libexpat/pull/262/commits/11f8838bf99ea0a6f0b76f9760c43704d00c4ff6 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/06/msg00028.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CEJJSQSG3KSUQY4FPVHZ7ZTT7FORMFVD/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IDAUGEB3TUP6NEKJDBUBZX7N5OAUOOOK/
https://seclists.org/bugtraq/2019/Jun/39 Mailing List Third Party Advisory
https://security.gentoo.org/glsa/201911-08 Third Party Advisory
https://security.netapp.com/advisory/ntap-20190703-0001/ Third Party Advisory
https://support.f5.com/csp/article/K51011533 Third Party Advisory
https://usn.ubuntu.com/4040-1/ Third Party Advisory
https://usn.ubuntu.com/4040-2/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4472 Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.html Patch 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/cpuoct2021.html Patch Third Party Advisory
https://www.tenable.com/security/tns-2021-11 Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
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:*:*:*:*:*:*:*

Configuration 3 (hide)

OR cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Configuration 4 (hide)

OR cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*

Configuration 5 (hide)

OR cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*

Configuration 6 (hide)

OR cpe:2.3:a:oracle:hospitality_res_3700:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:http_server:12.1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:outside_in_technology:8.5.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:outside_in_technology:8.5.5:*:*:*:*:*:*:*

Configuration 7 (hide)

cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:*
History

21 Nov 2024, 04:02

Type Values Removed Values Added
References () http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00039.html - Mailing List, Third Party Advisory () http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00039.html - Mailing List, Third Party Advisory
References () https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5226 - Issue Tracking, Third Party Advisory () https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5226 - Issue Tracking, Third Party Advisory
References () https://github.com/libexpat/libexpat/blob/R_2_2_7/expat/Changes - Release Notes, Third Party Advisory () https://github.com/libexpat/libexpat/blob/R_2_2_7/expat/Changes - Release Notes, Third Party Advisory
References () https://github.com/libexpat/libexpat/issues/186 - Issue Tracking, Patch, Third Party Advisory () https://github.com/libexpat/libexpat/issues/186 - Issue Tracking, Patch, Third Party Advisory
References () https://github.com/libexpat/libexpat/pull/262 - Exploit, Patch, Third Party Advisory () https://github.com/libexpat/libexpat/pull/262 - Exploit, Patch, Third Party Advisory
References () https://github.com/libexpat/libexpat/pull/262/commits/11f8838bf99ea0a6f0b76f9760c43704d00c4ff6 - Patch, Third Party Advisory () https://github.com/libexpat/libexpat/pull/262/commits/11f8838bf99ea0a6f0b76f9760c43704d00c4ff6 - Patch, Third Party Advisory
References () https://lists.debian.org/debian-lts-announce/2019/06/msg00028.html - Mailing List, Third Party Advisory () https://lists.debian.org/debian-lts-announce/2019/06/msg00028.html - Mailing List, Third Party Advisory
References () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CEJJSQSG3KSUQY4FPVHZ7ZTT7FORMFVD/ - () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CEJJSQSG3KSUQY4FPVHZ7ZTT7FORMFVD/ -
References () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IDAUGEB3TUP6NEKJDBUBZX7N5OAUOOOK/ - () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IDAUGEB3TUP6NEKJDBUBZX7N5OAUOOOK/ -
References () https://seclists.org/bugtraq/2019/Jun/39 - Mailing List, Third Party Advisory () https://seclists.org/bugtraq/2019/Jun/39 - Mailing List, Third Party Advisory
References () https://security.gentoo.org/glsa/201911-08 - Third Party Advisory () https://security.gentoo.org/glsa/201911-08 - Third Party Advisory
References () https://security.netapp.com/advisory/ntap-20190703-0001/ - Third Party Advisory () https://security.netapp.com/advisory/ntap-20190703-0001/ - Third Party Advisory
References () https://support.f5.com/csp/article/K51011533 - Third Party Advisory () https://support.f5.com/csp/article/K51011533 - Third Party Advisory
References () https://usn.ubuntu.com/4040-1/ - Third Party Advisory () https://usn.ubuntu.com/4040-1/ - Third Party Advisory
References () https://usn.ubuntu.com/4040-2/ - Third Party Advisory () https://usn.ubuntu.com/4040-2/ - Third Party Advisory
References () https://www.debian.org/security/2019/dsa-4472 - Third Party Advisory () https://www.debian.org/security/2019/dsa-4472 - Third Party Advisory
References () https://www.oracle.com/security-alerts/cpuApr2021.html - Patch, Third Party Advisory () https://www.oracle.com/security-alerts/cpuApr2021.html - Patch, Third Party Advisory
References () https://www.oracle.com/security-alerts/cpuapr2020.html - Patch, Third Party Advisory () https://www.oracle.com/security-alerts/cpuapr2020.html - Patch, Third Party Advisory
References () https://www.oracle.com/security-alerts/cpuoct2020.html - Patch, Third Party Advisory () https://www.oracle.com/security-alerts/cpuoct2020.html - Patch, Third Party Advisory
References () https://www.oracle.com/security-alerts/cpuoct2021.html - Patch, Third Party Advisory () https://www.oracle.com/security-alerts/cpuoct2021.html - Patch, Third Party Advisory
References () https://www.tenable.com/security/tns-2021-11 - Third Party Advisory () https://www.tenable.com/security/tns-2021-11 - Third Party Advisory

18 Apr 2022, 17:17

Type Values Removed Values Added
References (N/A) https://www.oracle.com/security-alerts/cpuapr2020.html - Third Party Advisory (N/A) https://www.oracle.com/security-alerts/cpuapr2020.html - Patch, Third Party Advisory
References (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IDAUGEB3TUP6NEKJDBUBZX7N5OAUOOOK/ - Third Party Advisory (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IDAUGEB3TUP6NEKJDBUBZX7N5OAUOOOK/ - Mailing List, Third Party Advisory
References (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CEJJSQSG3KSUQY4FPVHZ7ZTT7FORMFVD/ - Third Party Advisory (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CEJJSQSG3KSUQY4FPVHZ7ZTT7FORMFVD/ - Mailing List, Third Party Advisory
References (MISC) https://www.oracle.com/security-alerts/cpuApr2021.html - (MISC) https://www.oracle.com/security-alerts/cpuApr2021.html - Patch, Third Party Advisory
References (MISC) https://www.oracle.com/security-alerts/cpuoct2020.html - Third Party Advisory (MISC) https://www.oracle.com/security-alerts/cpuoct2020.html - Patch, Third Party Advisory
References (MISC) https://www.oracle.com/security-alerts/cpuoct2021.html - (MISC) https://www.oracle.com/security-alerts/cpuoct2021.html - Patch, Third Party Advisory
References (CONFIRM) https://www.tenable.com/security/tns-2021-11 - (CONFIRM) https://www.tenable.com/security/tns-2021-11 - Third Party Advisory
CPE cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:http_server:12.1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:hospitality_res_3700:*:*:*:*:*:*:*:*
cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:*

20 Oct 2021, 11:15

Type Values Removed Values Added
References
  • (MISC) https://www.oracle.com/security-alerts/cpuoct2021.html -

15 Jun 2021, 23:15

Type Values Removed Values Added
References
  • (CONFIRM) https://www.tenable.com/security/tns-2021-11 -

14 Jun 2021, 18:15

Type Values Removed Values Added
References
  • (MISC) https://www.oracle.com/security-alerts/cpuApr2021.html -
Information

Published : 2019-06-24 17:15

Updated : 2024-11-21 04:02

NVD link : CVE-2018-20843

Mitre link : CVE-2018-20843

CVE.ORG link : CVE-2018-20843

JSON object : View

Products Affected

libexpat_project

  • libexpat

canonical

  • ubuntu_linux

tenable

  • nessus

oracle

  • http_server
  • outside_in_technology
  • hospitality_res_3700

debian

  • debian_linux

fedoraproject

  • fedora

opensuse

  • leap
CWE
CWE-611

Improper Restriction of XML External Entity Reference