CVE-2003-1564 Denial of service in n/a
Attackers can cause denial of service via memory and CPU exhaustion using crafted XML with nested entity references in libxml2.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2003-1564?
CVE-2003-1564 is a medium-severity denial of service vulnerability in Xmlsoft Libxml2, published on 2 Sep 2008. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
libxml2, possibly before 2.5.0, does not properly detect recursion during entity expansion, which allows context-dependent attackers to cause a denial of service (memory and CPU consumption) via a crafted XML document containing a large number of nested entity references, aka the "billion laughs attack."
Weakness: CWE-776
Which versions are affected by CVE-2003-1564?
It affects 1 product.
Products include Xmlsoft Libxml2.
How do I fix CVE-2003-1564?
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-2003-1564 being exploited?
There is no known exploitation of CVE-2003-1564 in the wild and no public exploit code.
Other vulnerabilities in Xmlsoft Libxml2
Sources
Also known as GHSA-6wfm-7hqx-39wg.