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CVE-2003-1564
libxml2, possibly before 2.5.0, does not properly detect recursion during entity expansion, which allows context-dependent attackers to…
Medium6.5EPSS 1.6%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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."
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 1.6% · top 24% of all CVEs (2 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
n/a
- affected n/a
References (6)
- 31868 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://xmlsoft.org/news.html (opens in a new tab)x_refsource_MISCx_transferred
- [xml-dev] 20030202 Re: Elliotte Rusty Harold on Web Services (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- http://www.reddit.com/r/programming/comments/65843/time_to_upgrade_libxml2 (opens in a new tab)x_refsource_MISCx_transferred
- [xml] 20080820 Security fix for libxml2 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- RHSA-2008:0886 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Record last updated .