CVE-2021-34798
NULL pointer dereference in httpd core
7.5
HIGH
CVSS 3.1
EPSS 64.5%
Description
Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier.
How to fix CVE-2021-34798
To remediate CVE-2021-34798, upgrade the affected package to a fixed version below.
- Alpine/apache2—upgrade to 2.4.49-r0 or later
- Bitnami/apache—upgrade to 2.4.49 or later
- —upgrade to 2.4.51-1~deb11u1 or later
- —upgrade to 2.4.25-3+deb9u11 or later
- —upgrade to 2.4.38-3+deb10u6 or later
Is CVE-2021-34798 being exploited?
Likely — EPSS is 64.5%, placing CVE-2021-34798 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (5)
- from 0, < 2.4.49-r0
- from 0, < 2.4.49
- from 0, < 2.4.51-1~deb11u1
- from 0, < 2.4.25-3+deb9u11
- from 0, < 2.4.38-3+deb10u6
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |