Vulnerabilities
Misconfiguration
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CVE Vulnerabilities

CVE-2011-1755

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

Published: Jun 21, 2011 | Modified: Apr 11, 2025
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
5 LOW
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V3
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2011-1755
CWEhttps://cwe.mitre.org/data/definitions/776.html

jabberd2 before 2.2.14 does not properly detect recursion during entity expansion, which allows remote attackers to cause a denial of service (memory and CPU consumption) via a crafted XML document containing a large number of nested entity references, a similar issue to CVE-2003-1564.

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

NameVendorStart VersionEnd Version
Jabberd2Jabberd2*2.2.14 (excluding)
Red Hat Network Proxy v 5.4RedHatjabberd-0:2.2.8-12.el5sat*
Red Hat Network Satellite Server v 5.4RedHatjabberd-0:2.2.8-12.el5sat*
Jabberd2Ubuntudapper*
Jabberd2Ubuntudevel*
Jabberd2Ubuntuhardy*
Jabberd2Ubuntulucid*
Jabberd2Ubuntumaverick*
Jabberd2Ubuntunatty*
Jabberd2Ubuntuupstream*

Potential Mitigations

References

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