CVE-2011-1753

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-06-21 · updated 2026-06-16
Weakness: CWE-399

Description

expat_erl.c in ejabberd before 2.1.7 and 3.x before 3.0.0-alpha-3, and exmpp before 0.9.7, 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.

Affected products

Process-One Ejabberd: through 2.1.6; 0.9, 0.9.1, 0.9.8, 1.0.0, 1.1.0, 1.1.1 (+21)
Process-One Exmpp: through 0.9.6; 0.9.1, 0.9.2, 0.9.3, 0.9.4, 0.9.5

References

http://lists.fedoraproject.org/pipermail/package-announce/2011-June/062099.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/062145.html
http://secunia.com/advisories/44765
http://secunia.com/advisories/44807
http://secunia.com/advisories/45120
http://www.debian.org/security/2011/dsa-2248
http://www.ejabberd.im/ejabberd-2.1.7
http://www.process-one.net/en/ejabberd/release_notes/release_note_ejabberd_2.1.7/
http://www.securityfocus.com/bid/48072
https://bugzilla.redhat.com/show_bug.cgi?id=700454
https://exchange.xforce.ibmcloud.com/vulnerabilities/67769
https://git.process-one.net/ejabberd/mainline/commit/bd1df027c622e1f96f9eeaac612a6a956c1ff0b6

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