Bug 243257

Summary: CVE-2007-1217 Overflow in CAPI subsystem
Product: Red Hat Enterprise Linux 4 Reporter: Marcel Holtmann <holtmann>
Component: kernelAssignee: Jason Baron <jbaron>
Status: CLOSED ERRATA QA Contact: Martin Jenner <mjenner>
Severity: medium Docs Contact:
Priority: medium    
Version: 4.0CC: jbaron, jlieskov, knoel, kzhang, security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=moderate,source=vendorsec,reported=20070213,public=20070126
Fixed In Version: RHSA-2007-0774 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2007-09-04 14:37:49 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
Patch by Don Howard none

Description Marcel Holtmann 2007-06-08 10:12:22 UTC 
The bufprint routine used by capi_cmsg2str does an unbounded vsprintf into a
8192 byte buffer, perhaps hoping it's big enough.

If the content of that vsprintf can be controlled by remote peers, this may lead
to a remote security hole for daemons using CAPI (pppd-capi-plugin,
asterisk-chan-capi, capi4hylafax, ...). Or a DoS.

If the content of that vsprintf can be controlled by local users making use of a
system service (such as sending a fax, making a phone call, ...) that uses CAPI,
this is a privilege escalation or remote authenticated user security hole, or a DoS.
Comment 1 Anton Arapov 2007-06-28 07:48:09 UTC 
Created attachment 158099 [details]
Patch by Don Howard

Upstream patch breaks kABI. The following patch do bounds checking when
printing.
Comment 2 Don Howard 2007-07-31 21:28:00 UTC 
A patch addressing this issue has been included in build 2.6.9-55.0.3.EL.
Comment 6 Red Hat Bugzilla 2007-09-04 14:37:49 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2007-0774.html
Comment 7 Jan Lieskovsky 2007-11-29 14:03:39 UTC 
*** Bug 402781 has been marked as a duplicate of this bug. ***
Comment 8 Jan Lieskovsky 2007-11-29 14:10:48 UTC 
*** Bug 402791 has been marked as a duplicate of this bug. ***