Vulnerability Monitor

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CVE-2017-9233

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.

Published

2017-07-25T20:29:00.220

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-611
CWE-835

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	libexpat_project	libexpat	≤ 2.2.0	Yes
Application	python	python	< 2.7.15	Yes
Application	python	python	< 3.3.7	Yes
Application	python	python	< 3.4.7	Yes
Application	python	python	< 3.5.4	Yes
Application	python	python	< 3.6.2	Yes
Operating System	debian	debian_linux	8.0	Yes
Operating System	debian	debian_linux	9.0	Yes
Operating System	debian	debian_linux	10.0	Yes

References

http://www.debian.org/security/2017/dsa-3898 Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2017/06/17/7 Mailing List, VDB Entry ([email protected])
http://www.securityfocus.com/bid/99276 Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1039427 Third Party Advisory, VDB Entry ([email protected])
https://github.com/libexpat/libexpat/blob/master/expat/Changes Release Notes, Third Party Advisory ([email protected])
https://libexpat.github.io/doc/cve-2017-9233/ Exploit, Technical Description, Vendor Advisory ([email protected])
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E ([email protected])
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E ([email protected])
https://support.apple.com/HT208112 Third Party Advisory ([email protected])
https://support.apple.com/HT208113 Third Party Advisory ([email protected])
https://support.apple.com/HT208115 Third Party Advisory ([email protected])
https://support.apple.com/HT208144 Third Party Advisory ([email protected])
https://support.f5.com/csp/article/K03244804 Third Party Advisory ([email protected])
http://www.debian.org/security/2017/dsa-3898 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2017/06/17/7 Mailing List, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/99276 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1039427 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/libexpat/libexpat/blob/master/expat/Changes Release Notes, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://libexpat.github.io/doc/cve-2017-9233/ Exploit, Technical Description, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E (af854a3a-2127-422b-91ae-364da2661108)
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/HT208112 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/HT208113 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/HT208115 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/HT208144 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.f5.com/csp/article/K03244804 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)