CVE-2021-4204: Input Validation
First published: Tue Jan 11 2022(Updated: )
An out of bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation. This could allow a local attacker with a special privilege to crash the system or leak kernel internal information. Reference: <a href="https://www.openwall.com/lists/oss-security/2022/01/11/4">https://www.openwall.com/lists/oss-security/2022/01/11/4</a>
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <5.8.0 | |
| Linux Linux kernel | =5.8.0 | |
| Debian Debian Linux | =11.0 | |
| Redhat Enterprise Linux | =9.0 | |
| Netapp H300s Firmware | ||
| Netapp H300s | ||
| Netapp H500s Firmware | ||
| Netapp H500s | ||
| Netapp H700s Firmware | ||
| Netapp H700s | ||
| Netapp H410s Firmware | ||
| Netapp H410s | ||
| Netapp H410c Firmware | ||
| Netapp H410c | ||
| All of | ||
| Netapp H300s Firmware | ||
| Netapp H300s | ||
| All of | ||
| Netapp H500s Firmware | ||
| Netapp H500s | ||
| All of | ||
| Netapp H700s Firmware | ||
| Netapp H700s | ||
| All of | ||
| Netapp H410s Firmware | ||
| Netapp H410s | ||
| All of | ||
| Netapp H410c Firmware | ||
| Netapp H410c | ||
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.115-1 6.1.119-1 6.11.10-1 6.12.3-1 |
Remedy
Disable unprivileged ebpf with: sudo sysctl kernel.unprivileged_bpf_disabled=1
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Reference Links
- https://access.redhat.com/security/cve/CVE-2021-4204
- https://bugzilla.redhat.com/show_bug.cgi?id=2039178
- https://security-tracker.debian.org/tracker/CVE-2021-4204
- https://www.openwall.com/lists/oss-security/2022/01/11/4
- https://security.netapp.com/advisory/ntap-20221228-0003/
- https://launchpad.net/bugs/cve/CVE-2021-4204
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4204
- https://nvd.nist.gov/vuln/detail/CVE-2021-4204
- https://ubuntu.com/security/CVE-2021-4204
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2039896
- https://access.redhat.com/errata/RHSA-2024:0724
- https://access.redhat.com/errata/RHSA-2024:2950
- https://access.redhat.com/errata/RHSA-2024:3138
- https://access.redhat.com/errata/RHSA-2024:10262
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