CVE-2021-20177
First published: Mon Jan 11 2021(Updated: )
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.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <=5.4.9 | |
| redhat/kernel | <5.5 | 5.5 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.6-1 6.12.9-1 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1914719
- https://launchpad.net/bugs/cve/CVE-2021-20177
- https://github.com/torvalds/linux/commit/ca58fbe06c54
- https://bugzilla.kernel.org/show_bug.cgi?id=209823
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1914720
- https://www.openwall.com/lists/oss-security/2021/01/12/1
- https://security-tracker.debian.org/tracker/CVE-2021-20177
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20177
- https://nvd.nist.gov/vuln/detail/CVE-2021-20177
- https://ubuntu.com/security/CVE-2021-20177
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