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Apple iChat Format String Bug Lets Remote Users Execute Arbitrary Code and Null Pointer Dereference Lets Remote Users Deny Service
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SecurityTracker Alert ID: 1017661 |
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SecurityTracker URL: http://securitytracker.com/id/1017661
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CVE Reference:
CVE-2007-0021, CVE-2007-0614, CVE-2007-0710
(Links to External Site)
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Date: Feb 16 2007
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Impact:
Denial of service via network, Execution of arbitrary code via network, User access via network
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Fix Available: Yes Vendor Confirmed: Yes
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Description:
Several vulnerabilities were reported in iChat. A remote user can execute arbitrary code on the target system. A remote user can cause denial of service conditions.
A remote user on the local network can create a specially crafted Bonjour message to trigger a null pointer dereference and cause the target iChat application to crash [CVE-2007-0614, CVE-2007-0710].
The original advisory is available at:
http://projects.info-pull.com/moab/MOAB-29-01-2007.html
A remote user can create a specially crafted AIM URL that, when loaded by the target user, will trigger a format string flaw and cause the iChat application to crash or execute arbitrary code [CVE-2007-0021].
The original advisory is available at:
http://projects.info-pull.com/moab/MOAB-20-01-2007.html
LMH discovered these vulnerabilities.
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Impact:
A remote user can execute arbitrary code on the target system.
A remote user can cause denial of service conditions.
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Solution:
Apple has released a fix as part of Security Update 2007-002, available from the Software Update pane in System Preferences, or Apple's Software Downloads web site at:
http://www.apple.com/support/downloads/
For Mac OS X v10.4.8 (PowerPC)
The download file is named: "SecUpd2007-002Ti.dmg"
Its SHA-1 digest is: 79da4e0f61288277f9896e761903abf748d2dc21
For Mac OS X v10.4.8 (Intel)
The download file is named: "SecUpd2007-002Univ.dmg"
Its SHA-1 digest is: 9a4b97853ac05ff407a8b8fe0906d916e219648b
For Mac OS X v10.3.9
The download file is named: "SecUpd2007-002Pan.dmg"
Its SHA-1 digest is: 81199248bf7218d8788663153131ab51d31320a1
The Apple advisory is available at:
http://docs.info.apple.com/article.html?artnum=305102
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Vendor URL: docs.info.apple.com/article.html?artnum=305102 (Links to External Site)
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Cause:
Boundary error, Input validation error, State error
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Underlying OS:
UNIX (OS X)
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Message History:
None.
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Source Message Contents
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Date: Thu, 15 Feb 2007 09:15:22 -0800
Subject: APPLE-SA-2007-02-15 Security Update 2007-002
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
APPLE-SA-2007-02-15 Security Update 2007-002
Security Update 2007-002 is now available and addresses the following
issues:
Finder
CVE-ID: CVE-2007-0197
Available for: Mac OS X v10.4.8, Mac OS X Server v10.4.8
Impact: Mounting a maliciously-crafted disk image may lead to an
application crash or arbitrary code execution
Description: A buffer overflow exists in Finder's handling of
volume names. By enticing a user to mount a malicious disk
image, an attacker could trigger this issue, which may lead to
an application crash or arbitrary code execution. A proof of
concept for this issue has been published on the Month of Apple
Bugs web site (MOAB-09-01-2007). This update addresses the issue
by performing additional validation of disk images. This issue
does not affect systems prior to Mac OS X v10.4. Credit to Kevin
Finisterre of DigitalMunition for reporting this issue.
iChat
CVE-ID: CVE-2007-0614, CVE-2007-0710
Available for: Mac OS X v10.3.9, Mac OS X Server v10.3.9, Mac OS
X v10.4.8, Mac OS X Server v10.4.8
Impact: Attackers on the local network may be able to cause
iChat to crash
Description: A null pointer dereference in iChat's Bonjour
message handling could allow a local network attacker to cause
an application crash. A proof of concept for this issue in Mac
OS X v10.4 has been published on the Month of Apple Bugs web
site (MOAB-29-01-2007). This update addresses the issues by
performing additional validation of Bonjour messages.
iChat
CVE-ID: CVE-2007-0021
Available for: Mac OS X v10.3.9, Mac OS X Server v10.3.9, Mac OS
X v10.4.8, Mac OS X Server v10.4.8
Impact: Visiting malicious websites may lead to an application
crash or arbitrary code execution
Description: A format string vulnerability exists in the iChat
AIM URL handler. By enticing a user to access a maliciously-crafted
AIM URL, an attacker can trigger the overflow, which may lead to an
application crash or arbitrary code execution. A proof of concept for
this issue has been published on the Month of Apple Bugs web site
(MOAB-20-01-2007). This update addresses the issue by performing
additional validation of AIM URLs.
UserNotification
CVE-ID: CVE-2007-0023
Available for: Mac OS X v10.3.9, Mac OS X Server v10.3.9, Mac OS
X v10.4.8, Mac OS X Server v10.4.8
Impact: Malicious local users may be able to obtain system
privileges
Description: The UserNotificationCenter process runs with
elevated privileges in the context of a local user. This may
allow a malicious local user to overwrite or modify system
files. A program that triggers this issue has been published on
the Month of Apple Bugs web site (MOAB-22-01-2007). This update
addresses the issue by having UserNotificationCenter drop its
group privileges immediately after launching.
Security Update 2007-002 may be obtained from the Software Update
pane in System Preferences, or Apple's Software Downloads web site:
http://www.apple.com/support/downloads/
For Mac OS X v10.4.8 (PowerPC)
The download file is named: "SecUpd2007-002Ti.dmg"
Its SHA-1 digest is: 79da4e0f61288277f9896e761903abf748d2dc21
For Mac OS X v10.4.8 (Intel)
The download file is named: "SecUpd2007-002Univ.dmg"
Its SHA-1 digest is: 9a4b97853ac05ff407a8b8fe0906d916e219648b
For Mac OS X v10.3.9
The download file is named: "SecUpd2007-002Pan.dmg"
Its SHA-1 digest is: 81199248bf7218d8788663153131ab51d31320a1
Information will also be posted to the Apple Product Security
web site:
http://docs.info.apple.com/article.html?artnum=61798
This message is signed with Apple's Product Security PGP key,
and details are available at:
http://www.apple.com/support/security/pgp/
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