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CVE-2017-9233

Good to know:

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Date: 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.

Language: C

Severity Score

Related Resources (20)

https://support.apple.com/HT208112
https://nvd.nist.gov/vuln/detail/CVE-2017-9233
https://support.apple.com/HT208113
https://bugs.python.org/issue30694
https://support.apple.com/HT208115
http://www.openwall.com/lists/oss-security/2017/06/17/7
https://support.f5.com/csp/article/K03244804
https://support.apple.com/HT208144
http://www.securityfocus.com/bid/99276
https://people.canonical.com/~ubuntu-security/cve/CVE-2017-9233
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
https://libexpat.github.io/doc/cve-2017-9233/
http://www.securitytracker.com/id/1039427
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
http://www.debian.org/security/2017/dsa-3898
https://access.redhat.com/security/cve/CVE-2017-9233
https://github.com/libexpat/libexpat/blob/master/expat/Changes
https://security-tracker.debian.org/tracker/CVE-2017-9233
https://github.com/libexpat/libexpat/blob/R_2_2_1/expat/Changes
https://www.mend.io/vulnerability-database/CVE-2017-9233

Severity Score

Weakness Type (CWE)

Improper Restriction of XML External Entity Reference ('XXE')

CWE-611

Loop with Unreachable Exit Condition ('Infinite Loop')

CWE-835

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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