Bug 1081972 (CVE-2018-7273)

Summary: VUL-1: CVE-2018-7273 kernel: Kernel address information leak in drivers/block/floppy.c:show_floppy function
Product: [Novell Products] SUSE Security Incidents Reporter: Johannes Segitz <jsegitz>
Component: IncidentsAssignee: Security Team bot <security-team>
Status: RESOLVED UPSTREAM QA Contact: Security Team bot <security-team>
Severity: Minor    
Priority: P4 - Low CC: meissner, smash_bz, tiwai
Version: unspecified   
Target Milestone: ---   
Hardware: Other   
OS: Other   
URL: https://smash.suse.de/issue/200509/
Whiteboard: CVSSv3:SUSE:CVE-2018-7273:4.0:(AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) maint:planned:update
Found By: Security Response Team Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description Johannes Segitz 2018-02-21 10:45:46 UTC
rh#1547384

In the Linux kernel through 4.15.4, the floppy driver reveals the addresses of
kernel functions and global variables using printk calls within the function
show_floppy in drivers/block/floppy.c. An attacker can read this information
from dmesg and use the addresses to find the locations of kernel code and data
and bypass kernel security protections such as KASLR.

References:
https://bugzilla.redhat.com/show_bug.cgi?id=1547384
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7273
http://www.cvedetails.com/cve/CVE-2018-7273/
https://lkml.org/lkml/2018/2/20/669
Comment 1 Takashi Iwai 2018-02-22 16:32:44 UTC
Let's assign to the upstream floppy driver maintainer :)
Comment 2 Takashi Iwai 2018-10-16 09:07:13 UTC
It's the kernel address printing and in general no issue for our SLE kernels, so far.

Reassigned back to security team.
Comment 3 Marcus Meissner 2018-10-16 09:14:27 UTC
We are currently not planning to release this as bugfix upadte, as our kernels are still using known addresses.

Future SUSE versions will contain this fix.