Bug 1338756 (CVE-2016-4580) - CVE-2016-4580 kernel: Information leak in x25 module
Summary: CVE-2016-4580 kernel: Information leak in x25 module
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2016-4580
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1338757
Blocks: Embargoed1332934
TreeView+ depends on / blocked
 
Reported: 2016-05-23 11:52 UTC by Andrej Nemec
Modified: 2021-02-17 03:51 UTC (History)
34 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
A vulnerability was found in the Linux kernel. There is an information leak in the x25 module (net/x25/x25_facilities.c). Stack object "dte_facilities" is allocated in x25_rx_call_request(), which is supposed to be initialized in x25_negotiate_facilities(). However, 5 fields (8 bytes in total) are not initialized. This object is then copied to userland via copy_to_user(), thus info leak occurs.
Clone Of:
Environment:
Last Closed: 2016-06-07 09:29:11 UTC

Attachments (Terms of Use)

Description Andrej Nemec 2016-05-23 11:52:23 UTC 
A vulnerability was found in the Linux kernel. There is an information leak in the x25 module (net/x25/x25_facilities.c). Stack object "dte_facilities" is allocated in x25_rx_call_request(), which is supposed to be initialized in x25_negotiate_facilities. However, 5 fields (8 bytes in total) are not initialized. This object is then copied to userland via copy_to_user, thus info leak occurs.

References:

http://www.openwall.com/lists/oss-security/2016/05/10/12

https://lkml.org/lkml/2016/5/8/59

CVE-ID request:

http://seclists.org/oss-sec/2016/q2/308

Upstream patch:

https://github.com/torvalds/linux/commit/79e48650320e6fba48369fccf13fd045315b19b8

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=79e48650320e6fba48369fccf13fd045315b19b8
Comment 1 Andrej Nemec 2016-05-23 11:53:07 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1338757]
Comment 3 Vladis Dronov 2016-06-07 09:29:11 UTC 
Statement:

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and MRG-2. This has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
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