Vulnerability · Published Feb 18, 2022 · Assigned by redhat
CVE-2021-20325
Critical 9.8
In plain English
A critical-severity memory corruption in httpd. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 76% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Missing fixes for CVE-2021-40438 and CVE-2021-26691 in the versions of httpd, as shipped in Red Hat Enterprise Linux 8.5.0, causes a security regression compared to the versions shipped in Red Hat Enterprise Linux 8.4. A user who installs or updates to Red Hat Enterprise Linux 8.5.0 would be vulnerable to the mentioned CVEs, even if they were properly fixed in Red Hat Enterprise Linux 8.4. CVE-2021-20325 was assigned to that Red Hat specific security regression and it does not affect the upstream versions of httpd.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | httpd | 2.4.37-43.module_el8.5.0+2597+c4b14997.alma | ALSA-2021:4537 |
| AlmaLinux:8 | httpd-devel | 2.4.37-43.module_el8.5.0+2597+c4b14997.alma | ALSA-2021:4537 |
| AlmaLinux:8 | httpd-filesystem | 2.4.37-43.module_el8.5.0+2597+c4b14997.alma | ALSA-2021:4537 |
| AlmaLinux:8 | httpd-manual | 2.4.37-43.module_el8.5.0+2597+c4b14997.alma | ALSA-2021:4537 |
| AlmaLinux:8 | httpd-tools | 2.4.37-43.module_el8.5.0+2597+c4b14997.alma | ALSA-2021:4537 |
| AlmaLinux:8 | mod_http2 | 1.15.7-3.module_el8.5.0+2609+b30d9eec | ALSA-2021:4537 |
| AlmaLinux:8 | mod_ldap | 2.4.37-43.module_el8.5.0+2597+c4b14997.alma | ALSA-2021:4537 |
| AlmaLinux:8 | mod_md | 1:2.0.8-8.module_el8.5.0+2609+b30d9eec | ALSA-2021:4537 |
| AlmaLinux:8 | mod_md | 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa | ALSA-2021:4537 |
| AlmaLinux:8 | mod_proxy_html | 1:2.4.37-43.module_el8.5.0+2597+c4b14997.alma | ALSA-2021:4537 |
| AlmaLinux:8 | mod_session | 2.4.37-43.module_el8.5.0+2597+c4b14997.alma | ALSA-2021:4537 |
| AlmaLinux:8 | mod_ssl | 1:2.4.37-43.module_el8.5.0+2597+c4b14997.alma | ALSA-2021:4537 |
| Rocky Linux:8 | httpd | 0:2.4.37-43.module+el8.5.0+714+5ec56ee8 | RLSA-2021:4537 |
| Rocky Linux:8 | mod_http2 | 0:1.15.7-3.module+el8.4.0+553+7a69454b | RLSA-2021:4537 |
| Rocky Linux:8 | mod_http2 | 0:1.15.7-3.module+el8.5.0+695+1fa8055e | RLSA-2021:4537 |
| Rocky Linux:8 | mod_md | 1:2.0.8-8.module+el8.5.0+695+1fa8055e | RLSA-2021:4537 |
| Rocky Linux:8 | mod_md | 1:2.0.8-8.module+el8.4.0+553+7a69454b | RLSA-2021:4537 |
Affected products (as reported)
Weakness: CWE-119
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2017321 x_refsource_MISC