Bug 1826030 (CVE-2020-11494) - CVE-2020-11494 kernel: transmission of uninitialized data allows attackers to read sensitive information
Summary: CVE-2020-11494 kernel: transmission of uninitialized data allows attackers to...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2020-11494
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
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Whiteboard:
Depends On: 1826031 Engineering1829738 Engineering1829739 Engineering1829740
Blocks: Embargoed1826032
TreeView+ depends on / blocked
 
Reported: 2020-04-20 17:43 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-12-15 11:29 UTC (History)
42 users (show)

Fixed In Version:
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Doc Text:
A flaw was discovered in slc_bump in drivers/net/can/slcan.c in CAN Communication Protocol. It allows a local attacker with special user privilege (or root) to read sensitive kernel stack information (considering CONFIG_INIT_STACK_ALL is not enabled) when a partially initialized data structure is exposed over the network layer.
Clone Of:
Environment:
Last Closed: 2021-12-15 11:29:58 UTC

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Description Guilherme de Almeida Suckevicz 2020-04-20 17:43:24 UTC 
A flaw was discovered in slc_bump in drivers/net/can/slcan.c in CAN Communication Protocol. It allows a local attacker with special user privilege (or root)  to read sensitive kernel stack information (considering CONFIG_INIT_STACK_ALL is not enabled) when a partially initialized kernel data structure is exposed over the network layer.

Reference and upstream commit:
https://github.com/torvalds/linux/commit/b9258a2cece4ec1f020715fe3554bc2e360f6264
Comment 1 Guilherme de Almeida Suckevicz 2020-04-20 17:44:12 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1826031]
Comment 2 Justin M. Forbes 2020-04-20 18:05:51 UTC 
This was fixed for Fedora with the 5.5.17 stable kernel updates.
Comment 7 Rohit Keshri 2020-04-30 09:00:37 UTC 
Mitigation:

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
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