CVE-2018-20511: Infoleak
First published: Thu Dec 27 2018(Updated: )
An issue was discovered in the Linux kernel before 4.18.11. The ipddp_ioctl function in drivers/net/appletalk/ipddp.c allows local users to obtain sensitive kernel address information by leveraging CAP_NET_ADMIN to read the ipddp_route dev and next fields via an SIOCFINDIPDDPRT ioctl call.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <4.18.11 | |
| Debian Linux | =8.0 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.133-1 6.12.21-1 6.12.22-1 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9824dfae5741275473a23a7ed5756c7b6efacc9d
- http://www.securityfocus.com/bid/106347
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.11
- https://github.com/torvalds/linux/commit/9824dfae5741275473a23a7ed5756c7b6efacc9d
- https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
- https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
- https://lkml.org/lkml/2018/9/27/480
- https://usn.ubuntu.com/4094-1/
- https://usn.ubuntu.com/4118-1/
- https://launchpad.net/bugs/cve/CVE-2018-20511
- https://git.kernel.org/linus/9824dfae5741275473a23a7ed5756c7b6efacc9d
- https://security-tracker.debian.org/tracker/CVE-2018-20511
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20511
- https://nvd.nist.gov/vuln/detail/CVE-2018-20511
- https://ubuntu.com/security/CVE-2018-20511
Frequently Asked Questions
What is the severity of CVE-2018-20511?
CVE-2018-20511 is considered a medium severity vulnerability because it allows local users to gain sensitive kernel address information.
How do I fix CVE-2018-20511?
To fix CVE-2018-20511, update your Linux kernel to version 4.18.11 or later.
Which systems are affected by CVE-2018-20511?
CVE-2018-20511 affects the Linux kernel versions prior to 4.18.11, with specific impact on systems where CAP_NET_ADMIN permissions are granted.
Can CVE-2018-20511 be exploited remotely?
No, CVE-2018-20511 requires local access to the system for exploitation.
What are the potential consequences of CVE-2018-20511?
The potential consequences of CVE-2018-20511 include unauthorized access to sensitive kernel address information, which could aid in further attacks.
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