Bug 648661 (CVE-2010-4076)

Summary:	CVE-2010-4076 kernel: drivers/char/amiserial.c: reading uninitialized stack memory
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	Keywords:	Security
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Fixed In Version:		Doc Type:	Bug Fix
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Last Closed:	2015-08-21 23:26:40 UTC	Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description Petr Matousek 2010-11-01 21:20:38 UTC

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 10:53:53 UTC

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.