CVE-2021-20177
low
CVSS v3
—
CVSS v2
—
VIR risk
2.5
Description
A flaw was found in the Linux kernel's implementation of string matching within a packet. A privileged user (with root or CAP_NET_ADMIN) when inserting iptables rules could insert a rule which can panic the system. Kernel before kernel 5.5-rc1 is affected.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-20177
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-20177.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 5.4.81-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 5.5.13-1 |
| debian | bullseye | fixed | 5.5.13-1 |
| debian | forky | fixed | 5.5.13-1 |
| debian | sid | fixed | 5.5.13-1 |
| debian | trixie | fixed | 5.5.13-1 |
References
Verify integrity in audit chain (admin only). AS-IS.