CVE-2008-4409
Description
libxml2 2.7.0 and 2.7.1 does not properly handle "predefined entities definitions" in entities, which allows context-dependent attackers to cause a denial of service (memory consumption and application crash), as demonstrated by use of xmllint on a certain XML document, a different vulnerability than CVE-2003-1564 and CVE-2008-3281.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
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Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
libxml2 - Denial of Service
source: https://www.securityfocus.com/bid/31555/info
The libxml2 library is prone to a denial-of-service vulnerability caused by an error when handling files using entities in entity definitions.
An attacker can exploit this issue to cause the library to consume an excessive amount of memory, denying service to legitimate users.
The issue affects libxml2 2.7 prior to 2.7.2.
XML file:
<?xml version='1.0' ?>
<!DOCTYPE test [
<!ENTITY ampproblem '&'>
]>
<t a="&problem;">a</t> OS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 0 |
| sid | Fixed | 0 |
| forky | Fixed | 0 |
| bullseye | Fixed | 0 |
| bookworm | Fixed | 0 |
References
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.