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Bug 1148231 - (CVE-2014-3676) CVE-2014-3676 shim: heap-based buffer overflow flaw in IPv6 address parsing
CVE-2014-3676 shim: heap-based buffer overflow flaw in IPv6 address parsing
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20141013,repor...
: Security
Depends On: 1148239 1148240 1152388
Blocks: 1148235
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Reported: 2014-09-30 22:44 EDT by Murray McAllister
Modified: 2015-11-25 05:13 EST (History)
7 users (show)

See Also:
Fixed In Version: shim-0.7-8.el7
Doc Type: Bug Fix
Doc Text:
A heap-based buffer overflow flaw was found the way shim parsed certain IPv6 addresses. If IPv6 network booting was enabled, a malicious server could supply a crafted IPv6 address that would cause shim to crash or, potentially, execute arbitrary code.
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Clone Of:
Environment:
Last Closed: 2014-11-04 13:50:20 EST
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Regression: ---
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Documentation: ---
CRM:
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2014:1801 normal SHIPPED_LIVE Moderate: shim security update 2014-11-04 17:56:40 EST

  None (edit)
Description Murray McAllister 2014-09-30 22:44:16 EDT 
A heap-based buffer overflow flaw was found in shim when parsing IPv6 addresses. If IPv6 network booting were enabled, a malicious server could supply a crafted IPv6 address that would cause shim to crash or, potentially, execute arbitrary code.

Note that performing a secure boot over the network is not a common scenario.

Acknowledgements:

Red Hat would like to thank the SUSE Security Team for reporting this issue.
Comment 2 Murray McAllister 2014-09-30 22:57:38 EDT 
The proposed patch for this issue is the same as in https://bugzilla.redhat.com/show_bug.cgi?id=1148230#c2
Comment 6 Murray McAllister 2014-10-13 23:59:42 EDT 
Public now:

http://seclists.org/oss-sec/2014/q4/311
Comment 7 Murray McAllister 2014-10-14 00:02:45 EDT 
Created shim tracking bugs for this issue:

Affects: fedora-all [bug 1152388]
Comment 9 Fedora Update System 2014-11-01 13:07:38 EDT 
shim-0.8-1.fc22, shim-signed-0.8-1.fc22, mokutil-0.2.0-1.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 10 Martin Prpič 2014-11-04 05:25:06 EST 
IssueDescription:

A heap-based buffer overflow flaw was found the way shim parsed certain IPv6 addresses. If IPv6 network booting was enabled, a malicious server could supply a crafted IPv6 address that would cause shim to crash or, potentially, execute arbitrary code.
Comment 11 errata-xmlrpc 2014-11-04 12:56:52 EST 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2014:1801 https://rhn.redhat.com/errata/RHSA-2014-1801.html
Comment 12 Fedora Update System 2014-11-11 21:36:04 EST 
mokutil-0.2.0-1.fc19, shim-signed-0.8-2 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 13 Fedora Update System 2014-11-11 21:41:00 EST 
mokutil-0.2.0-1.fc20, shim-signed-0.8-3 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
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