CVE-2011-1755 Denial of service in n/a

High 7.5 Published 21 Jun 2011 Updated 6 Aug 2024

Remote attackers can cause denial of service via crafted XML with nested entities, affecting jabberd2 XMPP server deployments.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2011-1755?

CVE-2011-1755 is a high-severity denial of service vulnerability in Apple Mac Os X, published on 21 Jun 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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: CWE-776

Which versions are affected by CVE-2011-1755?

It affects 4 products.

Linux distribution packages (4)

`jabberd` Red Hat:network_proxy:5.4::el5	All versions	`0:2.2.8-12.el5sat`
`jabberd-debuginfo` Red Hat:network_proxy:5.4::el5	All versions	`0:2.2.8-12.el5sat`
`jabberd` Red Hat:network_satellite:5.4::el5	All versions	`0:2.2.8-12.el5sat`
`jabberd-debuginfo` Red Hat:network_satellite:5.4::el5	All versions	`0:2.2.8-12.el5sat`

Products include Apple Mac Os X, Apple Mac Os X Server, Fedoraproject Fedora, Jabberd2 Jabberd2.

How do I fix CVE-2011-1755?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2011-1755 being exploited?

There is no known exploitation of CVE-2011-1755 in the wild and no public exploit code.

All Apple Mac Os X vulnerabilities

Sources

Also known as DEBIAN-CVE-2011-1755, GHSA-rpcf-xw9j-7c7j, RHSA-2011:0881, RHSA-2011:0882.