CVE-2021-33200
Last modified
CVE-2021-33200 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. EPSS estimates a 0.38% chance of exploitation in the next 30 days.
Description
kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.4.116, < 5.4.123 |
| Linux | Linux Kernel | >= 5.10.33, < 5.10.41 |
| Linux | Linux Kernel | >= 5.11.17, < 5.12.8 |
| Fedoraproject | Fedora | 33 |
| Fedoraproject | Fedora | 34 |
| Netapp | Cloud Backup | All versions |
| Netapp | Solidfire \& Hci Management Node | All versions |
| Netapp | Solidfire Baseboard Management Controller | All versions |
| Netapp | H300s Firmware | All versions |
| Netapp | H500s Firmware | All versions |
| Netapp | H300e Firmware | All versions |
| Netapp | H500e Firmware | All versions |
| Netapp | H700e Firmware | All versions |
| Netapp | H410s Firmware | All versions |
| Netapp | H700s Firmware | All versions |
References
- https://security.netapp.com/advisory/ntap-20210706-0004/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/05/27/1Mailing List, Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210706-0004/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/05/27/1Mailing List, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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