CVE-2020-8428: Use After Free
First published: Tue Jan 28 2020(Updated: )
fs/namei.c in the Linux kernel before 5.5 has a may_create_in_sticky use-after-free, which allows local users to cause a denial of service (OOPS) or possibly obtain sensitive information from kernel memory, aka CID-d0cb50185ae9. One attack vector may be an open system call for a UNIX domain socket, if the socket is being moved to a new parent directory and its old parent directory is being removed.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=4.19<5.5 | |
| Google Android | ||
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.12.6-1 6.12.8-1 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
- http://packetstormsecurity.com/files/157233/Kernel-Live-Patch-Security-Notice-LSN-0065-1.html
- http://www.openwall.com/lists/oss-security/2020/01/28/4
- http://www.openwall.com/lists/oss-security/2020/02/02/1
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d0cb50185ae942b03c4327be322055d622dc79f6
- https://github.com/torvalds/linux/commit/d0cb50185ae942b03c4327be322055d622dc79f6
- https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- https://security.netapp.com/advisory/ntap-20200313-0003/
- https://usn.ubuntu.com/4318-1/
- https://usn.ubuntu.com/4319-1/
- https://usn.ubuntu.com/4320-1/
- https://usn.ubuntu.com/4324-1/
- https://usn.ubuntu.com/4325-1/
- https://www.debian.org/security/2020/dsa-4667
- https://www.debian.org/security/2020/dsa-4698
- https://www.openwall.com/lists/oss-security/2020/01/28/2
- https://launchpad.net/bugs/cve/CVE-2020-8428
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d0cb50185ae942b03c4327be322055d622dc79f6
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6404674acd596de41fd3ad5f267b4525494a891a
- https://source.android.com/docs/security/bulletin/2020-06-01 (Advisory)
- https://git.kernel.org/linus/d0cb50185ae942b03c4327be322055d622dc79f6
- https://security-tracker.debian.org/tracker/CVE-2020-8428
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8428
- https://nvd.nist.gov/vuln/detail/CVE-2020-8428
- https://ubuntu.com/security/CVE-2020-8428
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