Bug 243257 - CVE-2007-1217 Overflow in CAPI subsystem
CVE-2007-1217 Overflow in CAPI subsystem
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Jason Baron
Martin Jenner
: Security
: 402781 402791 (view as bug list)
Depends On:
  Show dependency treegraph
Reported: 2007-06-08 06:12 EDT by Marcel Holtmann
Modified: 2013-03-06 00:59 EST (History)
5 users (show)

See Also:
Fixed In Version: RHSA-2007-0774
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2007-09-04 10:37:49 EDT
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Regression: ---
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Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Patch by Don Howard (574 bytes, patch)
2007-06-28 03:48 EDT, Anton Arapov
no flags Details | Diff

  None (edit)
Description Marcel Holtmann 2007-06-08 06:12:22 EDT
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 03:48:09 EDT
Created attachment 158099 [details]
Patch by Don Howard

Upstream patch breaks kABI. The following patch do bounds checking when
Comment 2 Don Howard 2007-07-31 17:28:00 EDT
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 10:37:49 EDT
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.

Comment 7 Jan Lieskovsky 2007-11-29 09:03:39 EST
*** Bug 402781 has been marked as a duplicate of this bug. ***
Comment 8 Jan Lieskovsky 2007-11-29 09:10:48 EST
*** Bug 402791 has been marked as a duplicate of this bug. ***

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