Bug 231069 - CVE-2007-1217 Overflow in CAPI subsystem
Summary: CVE-2007-1217 Overflow in CAPI subsystem
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 3
Classification: Red Hat
Component: kernel (Show other bugs)
(Show other bugs)
Version: 3.0
Hardware: All Linux
medium
medium
Target Milestone: ---
Assignee: Don Howard
QA Contact: Martin Jenner
URL:
Whiteboard: impact=moderate,source=vendorsec,repo...
Keywords: Security
: 402771 (view as bug list)
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2007-03-05 22:16 UTC by Marcel Holtmann
Modified: 2007-11-30 22:07 UTC (History)
6 users (show)

Fixed In Version: RHSA-2007-0671
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Environment:
Last Closed: 2007-08-16 09:34:49 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---


Attachments (Terms of Use)
patch for this BZ (17.85 KB, patch)
2007-03-26 13:52 UTC, Radovan Augustin
no flags Details | Diff
CVS repository patch, adds CONFIG_CAPI_TRACE option (357 bytes, patch)
2007-03-26 13:53 UTC, Radovan Augustin
no flags Details | Diff
correct patch, only compilation tested, need to test with real hardware (18.89 KB, patch)
2007-03-30 13:13 UTC, Radovan Augustin
no flags Details | Diff


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2007:0671 normal SHIPPED_LIVE Moderate: kernel security and bugfix update 2007-08-16 09:34:44 UTC

Description Marcel Holtmann 2007-03-05 22:16:38 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 2 Ernie Petrides 2007-03-13 23:49:12 UTC
Marcel, the exploit in bug 230563 comment #1 requires access to
/dev/capi20, which has permission 600 (and thus needs super-user
privileges).  If that is our only exposure, please close this as
NOTABUG.

Comment 5 Radovan Augustin 2007-03-26 13:52:13 UTC
Created attachment 150897 [details]
patch for this BZ

Comment 6 Radovan Augustin 2007-03-26 13:53:10 UTC
Created attachment 150899 [details]
CVS repository patch, adds CONFIG_CAPI_TRACE option

Comment 7 Radovan Augustin 2007-03-26 13:59:50 UTC
Compilation is successful but not tested, because i do not have ISDN card available.

Comment 8 Radovan Augustin 2007-03-26 17:30:18 UTC
Patch still contains errors, please do not test it now.

Comment 9 Radovan Augustin 2007-03-30 13:13:28 UTC
Created attachment 151273 [details]
correct patch, only compilation tested, need to test with real hardware

Comment 13 Jerome Marchand 2007-07-26 07:51:32 UTC
fixed in build 2.4.21-51.EL

Comment 16 Red Hat Bugzilla 2007-08-16 09:34:49 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-2007-0671.html


Comment 17 Jan Lieskovsky 2007-11-29 14:08:05 UTC
*** Bug 402771 has been marked as a duplicate of this bug. ***


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