Bug 515250

Summary:	sys-boot/grub:2 - LZO Denial of Service and Arbitrary Code Execution through embedded code
Product:	Gentoo Security	Reporter:	Kristian Fiskerstrand (RETIRED) <k_f>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	RESOLVED WONTFIX
Severity:	normal	CC:	base-system, bkohler, floppym, hanno
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:	A3 [upstream]
Package list:		Runtime testing required:	---
Bug Depends on:
Bug Blocks:	515246

Description Kristian Fiskerstrand (RETIRED) gentoo-dev

2014-06-26 22:11:46 UTC

It is suspected that this package is vulnerable to a security vulnerability in LZO. As such we ask maintainers with packages suspected to be vulnerable to verify if the package is (or have been) affected. 

Please see the information contained in the tracker bug 515246. "An integer overflow may occur when processing any variant of a "literal run" in the lzo1x_decompress_safe function. Each of these three locations is subject to an integer overflow when processing zero bytes.", additional information about the upstream vulnerability is available at http://seclists.org/oss-sec/2014/q2/665

Comment 1 Mike Gilbert gentoo-dev

2014-06-27 03:54:51 UTC

The relevant code seems to exist in sys-boot/grub:2 in grub-core/lib/minilzo/minilzo.c.

I have no idea how to "fix" it; I will leave that to upstream.

Comment 2 Kristian Fiskerstrand (RETIRED) gentoo-dev

2014-06-27 10:11:08 UTC

Thanks. Do you have the upstream bug ID tracking this?

Comment 3 Mike Gilbert gentoo-dev

2014-06-27 15:23:57 UTC

I am not aware of a bug report upstream as of yet.

Comment 4 Kristian Fiskerstrand (RETIRED) gentoo-dev

2014-06-27 16:07:40 UTC

I've filed an upstream bug on https://savannah.gnu.org/bugs/index.php?42635

Comment 5 Thomas Deutschmann (RETIRED) gentoo-dev

2016-11-22 21:04:20 UTC

Kristian, maybe you want to ping the bug again? Library is still not updated in grub's git master.

Comment 6 Kristian Fiskerstrand (RETIRED) gentoo-dev

2016-11-22 21:12:24 UTC

(In reply to Thomas Deutschmann from comment #5)
> Kristian, maybe you want to ping the bug again? Library is still not updated
> in grub's git master.

I tend to agree with the assessment that severity is low on this

Comment 7 Aaron Bauman (RETIRED) gentoo-dev

2018-05-20 15:11:17 UTC

Upstream has no concerns of exploit with this and nothing has been found in the wild.  Furthermore, if a possible exploit existed then usual security measures would prevent it.