Vulnerability DatabaseCVE-2017-9233
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CVE-2017-9233
July 25, 2017
XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinite loop using a malformed external entity definition from an external DTD.
Related Resources (18)
http://www.securitytracker.com/id/1039427
https://support.apple.com/HT208144
https://support.apple.com/HT208115
https://support.f5.com/csp/article/K03244804
https://people.canonical.com/~ubuntu-security/cve/CVE-2017-9233
http://www.debian.org/security/2017/dsa-3898
http://www.securityfocus.com/bid/99276
http://www.openwall.com/lists/oss-security/2017/06/17/7
https://support.apple.com/HT208113
https://github.com/libexpat/libexpat/blob/R_2_2_1/expat/Changes
https://libexpat.github.io/doc/cve-2017-9233/
https://bugs.python.org/issue30694
https://security-tracker.debian.org/tracker/CVE-2017-9233
https://access.redhat.com/security/cve/CVE-2017-9233
https://support.apple.com/HT208112
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
https://github.com/libexpat/libexpat/blob/master/expat/Changes
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
CVSS v2
Base Score:
5
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Weakness Type (CWE)
Improper Restriction of XML External Entity Reference
CWE-611
Loop with Unreachable Exit Condition ('Infinite Loop')
CWE-835
EPSS
Base Score:
0.25