python-bleach: bleach.clean behavior parsing style attributes could result in a regular expression denial of service (ReDoS)
CVE-2020-6817 is fixed in 2 products on 1 platform, first by python-bleach 2.1.2-1ubuntu0.1~esm1, released February 16, 2023. It is not reported as exploited. Patch Radar priority: High.
bleach.clean behavior parsing style attributes could result in a regular expression denial of service (ReDoS). Calls to bleach.clean with an allowed tag with an allowed style attribute are vulnerable to ReDoS. For example, bleach.clean(..., attributes={'a': ['style']}).
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| python-bleach · Debian 12.15 (bookworm) | 3.1.4-1 | DEBIAN-CVE-2020-6817 | Feb 16, 2023 |
| python-bleach · Debian 13.5 (trixie) | 3.1.4-1 | DEBIAN-CVE-2020-6817 | Feb 16, 2023 |
| python-bleach · Debian 14 | 3.1.4-1 | DEBIAN-CVE-2020-6817 | Feb 16, 2023 |
| python-bleach · Ubuntu 18.04.6 LTS (bionic) | 2.1.2-1ubuntu0.1~esm1 | python-bleach 2.1.2-1ubuntu0.1~esm1 | Feb 16, 2023 |
| python3-bleach · Ubuntu 18.04.6 LTS (bionic) | 2.1.2-1ubuntu0.1~esm1 | python3-bleach 2.1.2-1ubuntu0.1~esm1 | Feb 16, 2023 |
| python3-bleach · Ubuntu 20.04 LTS (focal) | 3.1.1-1ubuntu0.1~esm1 | python3-bleach 3.1.1-1ubuntu0.1~esm1 | Feb 16, 2023 |
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