modsecurity-apache: Incorrect handling of '\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall b...
CVE-2023-24021 is fixed in 2 products on 1 platform, first by libapache2-mod-security2 2.9.2-1ubuntu0.1~esm1, released January 20, 2023. It is not reported as exploited. Patch Radar priority: High.
Incorrect handling of '\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the FILES_TMP_CONTENT collection.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libapache2-mod-security2 · Ubuntu 18.04.6 LTS (bionic) | 2.9.2-1ubuntu0.1~esm1 | libapache2-mod-security2 2.9.2-1ubuntu0.1~esm1 | Jan 20, 2023 |
| libapache2-mod-security2 · Ubuntu 20.04 LTS (focal) | 2.9.3-1ubuntu0.1 | libapache2-mod-security2 2.9.3-1ubuntu0.1 | Jan 20, 2023 |
| libapache2-mod-security2 · Ubuntu 22.04.1 LTS (jammy) | 2.9.5-1ubuntu0.1~esm1 | libapache2-mod-security2 2.9.5-1ubuntu0.1~esm1 | Jan 20, 2023 |
| modsecurity-apache · Debian 12.15 (bookworm) | 2.9.7-1 | DEBIAN-CVE-2023-24021 | Jan 20, 2023 |
| modsecurity-apache · Debian 13.5 (trixie) | 2.9.7-1 | DEBIAN-CVE-2023-24021 | Jan 20, 2023 |
| modsecurity-apache · Debian 14 | 2.9.7-1 | DEBIAN-CVE-2023-24021 | Jan 20, 2023 |
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