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Symantec Norton AntiVirus Multiple Local Privilege Escalation (MacOS)
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SUMMARY
" <http://www.symantec.com/nav/nav_mac/> Symantec's Norton AntiVirus for
Macintosh is an antivirus solution for the Mac OS X environment."
Local exploitation of a design error in Symantec Norton Antivirus for
Macintosh allows attackers to gain elevated privileges.
DETAILS
Vulnerable Systems:
* Symantec Norton AntiVirus for Mac version 9.0.3
Immune Systems:
* Symantec AntiVirus for Macintosh version 10
DiskMountNotify Local Privilege Escalation:
Local exploitation of a design error in the DiskMountNotify specifically
exists in failing to specify an explicit PATH for the
"/Library/Application Support/Norton Solutions Support/Norton
AntiVirus/DiskMountNotify.app/Contents/MacOS/DiskMountNotify" binary.
This binary is setuid, meaning it will run with the permissions of the
owner, and is owned by the System Administrator, which is equivalent to
the Unix root user. A user can simply add a directory they control to the
beginning of the PATH environment variable and DiskMountNotify will call
'ps' or 'grep' from that directory with root level privileges.
Successful exploitation allows a local attacker to execute arbitrary
commands as the System Administrator user. This allows complete system
compromise including the installation and removal of applications, and
ability to read and write any file on the system.
Workaround:
Unsetting the setuid bit from the "/Library/Application Support/Norton
Solutions Support/Norton
AntiVirus/DiskMountNotify.app/Contents/MacOS/DiskMountNotify" binary will
prevent exploitation, but may prevent automatic scanning on mounting by
non-administrator users.
Vendor Response:
The vendor has released the following advisory for this issue:
<http://www.symantec.com/avcenter/security/Content/2005.10.19.html>
http://www.symantec.com/avcenter/security/Content/2005.10.19.html
LiveUpdate Local Privilege Escalation:
Local exploitation of a design error in the LiveUpdate component
specifically exists in the permissions on the "/Library/Application
Support/Norton Solutions Support/LiveUpdate/jlucaller" binary which
appears to be a Java interpreter. This binary is setuid, meaning it will
run with the permissions of the owner, and is owned by the System
Administrator, which is equivalent to the Unix root user. A user can
simply compile a Java program and provide it as an argument to this
binary, and it will execute with root level privileges.
Successful exploitation allows a local attacker to execute arbitrary
commands as the System Administrator user. This allows complete system
compromise including the installation and removal of applications, and
ability to read and write any file on the system.
Workaround:
Unsetting the setuid bit from the "/Library/Application Support/Norton
Solutions Support/LiveUpdate/jlucaller" binary will prevent exploitation,
but may require that updates be performed as the System Administrator
user.
chmod -s "/Library/Application Support/Norton Solutions
Support/LiveUpdate/jlucaller"
Vendor Response:
The vendor has released the following advisory for this issue:
<http://www.symantec.com/avcenter/security/Content/2005.10.19a.html>
http://www.symantec.com/avcenter/security/Content/2005.10.19a.html
CVE Information:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2759 >
CAN-2005-2759
Disclosure Timeline:
08/31/2005 - Initial vendor notification
08/31/2005 - Initial vendor response
10/20/2005 - Coordinated public disclosure
ADDITIONAL INFORMATION
The information has been provided by
<mailto:idlabs-advisories@lists.idefense.com> iDEFENSE Labs.
The original article can be found at:
<http://www.idefense.com/application/poi/display?id=324&type=vulnerabilities>
http://www.idefense.com/application/poi/display?id=324&type=vulnerabilities,
<http://www.idefense.com/application/poi/display?id=325&type=vulnerabilities>
http://www.idefense.com/application/poi/display?id=325&type=vulnerabilities
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