CVE-2018-20843
- State
- Published
- Severity
- 7.5 High
- Published
- Jun 24, 2019
- Updated
- Oct 14, 2026
- Reserved
- Jun 24, 2019
Description
In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CISA-ADP |
Weaknesses
- CWE-611 Improper Restriction of XML External Entity Reference
Affected Products
| Product | Versions |
|---|---|
n/an/a |
|
References
- USN-4040-1vendor-advisory
- USN-4040-2vendor-advisory
- DSA-4472vendor-advisory
- 20190628 [SECURITY] [DSA 4472-1] expat security updatemailing-list
- [debian-lts-announce] 20190629 [SECURITY] [DLA 1839-1] expat security updatemailing-list
- FEDORA-2019-18868e1715vendor-advisory
- FEDORA-2019-139fcda84dvendor-advisory
- openSUSE-SU-2019:1777vendor-advisory
- GLSA-201911-08vendor-advisory
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://github.com/libexpat/libexpat/issues/186
- https://github.com/libexpat/libexpat/pull/262
- https://github.com/libexpat/libexpat/pull/262/commits/11f8838bf99ea0a6f0b76f9760c43704d00c4ff6
- https://github.com/libexpat/libexpat/blob/R_2_2_7/expat/Changes
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5226
- https://security.netapp.com/advisory/ntap-20190703-0001/
- https://support.f5.com/csp/article/K51011533
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://www.tenable.com/security/tns-2021-11
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
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