CVE-2016-4472
Python 3.5 and 1 other: The overflow protection in Expat is removed by compilers with certain optimization settings, which allows…
CVE-2016-4472 is fixed in 4 products on 2 platforms, first by Python 3.6 3.6.2, released July 17, 2017. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 2 platforms
CVSS
8.1
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.1195
96th percentile
The overflow protection in Expat is removed by compilers with certain optimization settings, which allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via crafted XML data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-1283 and CVE-2015-2716.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Python 3.5 | 3.5.4 | Python 3.5 3.5.4 | Aug 7, 2017 |
| Python 3.6 | 3.6.2 | Python 3.6 3.6.2 | Jul 17, 2017 |
| Linux | |||
| 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 |