Vulnerabilities
Misconfiguration
Runtime Security
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CVE Vulnerabilities

CVE-2017-5644

Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

Published: Mar 24, 2017 | Modified: Oct 20, 2020
CVSS 3.x
5.5
MEDIUM
Source:
NVD
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.x
7.1 HIGH
AV:N/AC:M/Au:N/C:N/I:N/A:C
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2017-5644
CWEhttps://cwe.mitre.org/data/definitions/776.html

Apache POI in versions prior to release 3.15 allows remote attackers to cause a denial of service (CPU consumption) via a specially crafted OOXML file, aka an XML Entity Expansion (XEE) attack.

Weakness

The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities.

Affected Software

Name Vendor Start Version End Version
Poi Apache * 3.14 (including)
Libapache-poi-java Ubuntu artful *
Libapache-poi-java Ubuntu esm-apps/xenial *
Libapache-poi-java Ubuntu precise *
Libapache-poi-java Ubuntu trusty *
Libapache-poi-java Ubuntu upstream *
Libapache-poi-java Ubuntu xenial *
Libapache-poi-java Ubuntu yakkety *
Libapache-poi-java Ubuntu zesty *

Potential Mitigations

References

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