2.1
CVSSv2

CVE-2021-20177

Published: 26/05/2021 Updated: 02/06/2021
CVSS v2 Base Score: 2.1 | Impact Score: 2.9 | Exploitability Score: 3.9
CVSS v3 Base Score: 4.4 | Impact Score: 3.6 | Exploitability Score: 0.8
VMScore: 187
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P

Vulnerability Summary

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.

Vulnerability Trend

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linux linux kernel

Vendor Advisories

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks CVE-2020-27815 A flaw was reported in the JFS filesystem code allowing a local attacker with the ability to set extended attributes to cause a denial of service CVE-2020-27825 Adam pi3 Z ...
A flaw was found in the Linux kernels 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 ...

Mailing Lists

<!--X-Body-Begin--> <!--X-User-Header--> oss-sec mailing list archives <!--X-User-Header-End--> <!--X-TopPNI--> By Date By Thread </form> <!--X-TopPNI-End--> <!--X-MsgBody--> <!--X-Subject-Header-Begin--> Re: CVE-2021-20177 kernel: iptables string match rule could result in kernel panic <!--X-Subject-Header-End--> <!--X-Head-of-M ...
<!--X-Body-Begin--> <!--X-User-Header--> oss-sec mailing list archives <!--X-User-Header-End--> <!--X-TopPNI--> By Date By Thread </form> <!--X-TopPNI-End--> <!--X-MsgBody--> <!--X-Subject-Header-Begin--> Re: CVE-2021-20177 kernel: iptables string match rule could result in kernel panic <!--X-Subject-Header-End--> <!--X-Head-of-M ...
<!--X-Body-Begin--> <!--X-User-Header--> oss-sec mailing list archives <!--X-User-Header-End--> <!--X-TopPNI--> By Date By Thread </form> <!--X-TopPNI-End--> <!--X-MsgBody--> <!--X-Subject-Header-Begin--> CVE-2021-20177 kernel: iptables string match rule could result in kernel panic <!--X-Subject-Header-End--> <!--X-Head-of-Messa ...