CVE-2018-20843 (High) detected in expat-expat-2.2.1

[mend-bolt-for-github]

CVE-2018-20843 - High Severity Vulnerability

Vulnerable Library - expatexpat-2.2.1

Fast XML parser library in C

Library home page: https://sourceforge.net/projects/expat/

Found in HEAD commit: 0b8ca0156130fe8d67f2fdd42af9d2f264587034

Library Source Files (17)

* The source files were matched to this source library based on a best effort match. Source libraries are selected from a list of probable public libraries.

• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/examples/outline.c
• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/lib/xmltok.c
• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/lib/siphash.h
• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/lib/expat_external.h
• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/xmlwf/xmlwf.c
• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/lib/xmlparse.c
• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/xmlwf/unixfilemap.c
• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/examples/elements.c
• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/xmlwf/readfilemap.c
• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/xmlwf/win32filemap.c
• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/lib/xmlrole.c
• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/lib/winconfig.h
• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/xmlwf/filemap.h
• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/xmlwf/xmlfile.c
• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/xmlwf/codepage.c
• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/lib/xmltok_impl.c
• /ecosurvivalserver/node_modules/node-expat/deps/libexpat/lib/expat.h

Vulnerability Details

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

URL: CVE-2018-20843

CVSS 3 Score Details (7.5)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20843

Release Date: 2019-06-24

Fix Resolution: 2.2.7

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