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:	Incidents	Assignee:	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.