expat: In libexpat in Expat before 2.2.7, XML input including XML names thatcontain a large number of colons could make the...
CVE-2018-20843 is fixed in 7 products on 1 platform, first by expat 2.2.5-3ubuntu0.1, released June 23, 2019. It is not reported as exploited. Patch Radar priority: High.
In libexpat in Expat before 2.2.7, XML input including XML names thatcontain a large number of colons could make the XML parser consume a highamount of RAM and CPU resources while processing (enough to be usable fordenial-of-service attacks).
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| expat · RHEL 8 | 0:2.2.5-4.el8 | RHSA-2020:4484 | Nov 4, 2020 |
| expat · Ubuntu 18.04.6 LTS (bionic) | 2.2.5-3ubuntu0.1 | expat 2.2.5-3ubuntu0.1 | Jun 23, 2019 |
| expat · Ubuntu 24.10 (oracular) | 2.2.6-2 | expat 2.2.6-2 | Jun 24, 2019 |
| expat · Ubuntu 25.04 (plucky) | 2.2.6-2 | expat 2.2.6-2 | Jun 24, 2019 |
| expat · ol 8 | 0:2.2.5-4.el8 | ELSA-2020-4484 | Nov 10, 2020 |
| expat-devel · RHEL 8 | 0:2.2.5-4.el8 | RHSA-2020:4484 | Nov 4, 2020 |
| expat-devel · ol 8 | 0:2.2.5-4.el8 | ELSA-2020-4484 | Nov 10, 2020 |
| libexpat1 · Ubuntu 18.04.6 LTS (bionic) | 2.2.5-3ubuntu0.1 | libexpat1 2.2.5-3ubuntu0.1 | Jun 23, 2019 |
| libexpat1 · Ubuntu 24.10 (oracular) | 2.2.6-2 | libexpat1 2.2.6-2 | Jun 24, 2019 |
| libexpat1 · Ubuntu 25.04 (plucky) | 2.2.6-2 | libexpat1 2.2.6-2 | Jun 24, 2019 |
| libxmltok1 · Ubuntu 18.04.6 LTS (bionic) | 1.2-4ubuntu0.18.04.1~esm4 | libxmltok1 1.2-4ubuntu0.18.04.1~esm4 | Jan 10, 2022 |
| libxmltok1 · Ubuntu 20.04 LTS (focal) | 1.2-4ubuntu0.20.04.1~esm4 | libxmltok1 1.2-4ubuntu0.20.04.1~esm4 | Jan 10, 2022 |
| libxmltok1 · Ubuntu 22.04.1 LTS (jammy) | 1.2-4ubuntu0.22.04.1~esm4 | libxmltok1 1.2-4ubuntu0.22.04.1~esm4 | Jan 10, 2022 |
| libxmltok1t64 · Ubuntu 24.04.5 LTS (noble) | 1.2-4.1ubuntu2.24.0.4.1+esm2 | libxmltok1t64 1.2-4.1ubuntu2.24.0.4.1+esm2 | Jan 10, 2022 |
| libxmltok1t64 · Ubuntu 24.10 (oracular) | 1.2-4.1ubuntu3.1 | libxmltok1t64 1.2-4.1ubuntu3.1 | Sep 4, 2019 |
| mingw32-expat · RHEL 8 | 0:2.2.4-5.el8 | RHSA-2020:4846 | Nov 4, 2020 |
| mingw64-expat · RHEL 8 | 0:2.2.4-5.el8 | RHSA-2020:4846 | Nov 4, 2020 |
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