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CVE-2011-1756 Details

Description

modules/xmpp/serv_xmpp.c in Citadel 7.86 and earlier 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.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
http://code.citadel.org/cgit.cgi/git.citadel.org/commit/?id=27c991cc2059f5530d3d4e9689dc976b745f5b0c	CVE	Patch
http://code.citadel.org/cgit.cgi/git.citadel.org/commit/?id=95040add546a705cc2d1d8f16293141f9f9845a6	CVE	Patch
http://packages.debian.org/changelogs/pool/main/c/citadel/citadel_7.37-8+lenny1/changelog	CVE
http://packages.debian.org/changelogs/pool/main/c/citadel/citadel_7.83-2squeeze2/changelog	CVE
http://secunia.com/advisories/44788	CVE	Vendor Advisory
http://security.debian.org/debian-security/pool/updates/main/c/citadel/citadel_7.83-2squeeze2.diff.gz	CVE	Patch
http://www.debian.org/security/2011/dsa-2250	CVE
http://www.securityfocus.com/bid/48071	CVE
http://code.citadel.org/cgit.cgi/git.citadel.org/commit/?id=27c991cc2059f5530d3d4e9689dc976b745f5b0c	[email protected]	Patch
http://code.citadel.org/cgit.cgi/git.citadel.org/commit/?id=95040add546a705cc2d1d8f16293141f9f9845a6	[email protected]	Patch
http://packages.debian.org/changelogs/pool/main/c/citadel/citadel_7.37-8+lenny1/changelog	[email protected]
http://packages.debian.org/changelogs/pool/main/c/citadel/citadel_7.83-2squeeze2/changelog	[email protected]
http://secunia.com/advisories/44788	[email protected]	Vendor Advisory
http://security.debian.org/debian-security/pool/updates/main/c/citadel/citadel_7.83-2squeeze2.diff.gz	[email protected]	Patch
http://www.debian.org/security/2011/dsa-2250	[email protected]
http://www.securityfocus.com/bid/48071	[email protected]

see all 16 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-399	Resource Management Errors	[email protected]

Affected Products

Product	Versions
citadel citadel	<= 7.86 7.11 7.50 7.60 7.80
CPE cpe:2.3:a:citadel:citadel:::::::: cpe:2.3:a:citadel:citadel:7.11:::::::* cpe:2.3:a:citadel:citadel:7.50:::::::* cpe:2.3:a:citadel:citadel:7.60:::::::* cpe:2.3:a:citadel:citadel:7.80:::::::* cpe:2.3:a:citadel:citadel:7.81:::::::* cpe:2.3:a:citadel:citadel:7.82:::::::* cpe:2.3:a:citadel:citadel:7.84:::::::* Remediation No remediation found in references.

Product

Versions

citadel citadel

<= 7.86

7.11

7.50

7.60

7.80

CPE

cpe:2.3:a:citadel:citadel:*:*:*:*:*:*:*:*
cpe:2.3:a:citadel:citadel:7.11:*:*:*:*:*:*:*
cpe:2.3:a:citadel:citadel:7.50:*:*:*:*:*:*:*
cpe:2.3:a:citadel:citadel:7.60:*:*:*:*:*:*:*
cpe:2.3:a:citadel:citadel:7.80:*:*:*:*:*:*:*
cpe:2.3:a:citadel:citadel:7.81:*:*:*:*:*:*:*
cpe:2.3:a:citadel:citadel:7.82:*:*:*:*:*:*:*
cpe:2.3:a:citadel:citadel:7.84:*:*:*:*:*:*:*

Remediation

No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 16, 2026	CVE Modified	[email protected]
Apr 29, 2026	Status Change	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Jun 21, 2011	Initial Analysis	[email protected]