Bug 648661 – CVE-2010-4076 kernel: drivers/char/amiserial.c: reading uninitialized stack memory

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Bug 648661 - (CVE-2010-4076) CVE-2010-4076 kernel: drivers/char/amiserial.c: reading uninitialized stack memory

Summary:	CVE-2010-4076 kernel: drivers/char/amiserial.c: reading uninitialized stack m...

Status:	CLOSED NOTABUG

Aliases:	CVE-2010-4076

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	Unspecified Unspecified

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
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URL:
Whiteboard:	public=20100915,reported=20101006,sou...
Keywords:	Security

Depends On:
Blocks:
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Reported:	2010-11-01 17:20 EDT by Petr Matousek
Modified:	2015-08-21 19:26 EDT (History)
CC List:	0 users

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2015-08-21 19:26:40 EDT
Type:	---
Regression:	---
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RHEL 7.3 requirements from Atomic Host:
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Description Petr Matousek 2010-11-01 17:20:38 EDT

Description of problem:
The TIOCGICOUNT device ioctl in amiserial.c allows unprivileged users to read uninitialized stack memory, because the "reserved" member of the serial_icounter_struct struct declared on the stack is not altered or zeroed before being copied back to the user.

Reference:
http://www.openwall.com/lists/oss-security/2010/10/06/6
http://lkml.org/lkml/2010/9/15/389

Acknowledgements:

Red Hat would like to thank Dan Rosenberg for reporting this issue.

Comment 1 Petr Matousek 2010-11-02 06:53:53 EDT

Statement:

This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 3, 4, 5, and Red Hat Enterprise MRG as they did not include support for Amiga built-in serial port.

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