SB2011060904 - Input validation error in Google, Google Android

Description

This security bulletin contains information about 1 vulnerability.

1) Input validation error (CVE-ID: CVE-2011-1823)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The vold volume manager daemon on Android 3.0 and 2.x before 2.3.4 trusts messages that are received from a PF_NETLINK socket, which allows local users to execute arbitrary code and gain root privileges via a negative index that bypasses a maximum-only signed integer check in the DirectVolume::handlePartitionAdded method, which triggers memory corruption, as demonstrated by Gingerbreak.

Remediation

Install update from vendor's website.

References

• http://android.git.kernel.org/?p=platform/system/core.git;a=commit;h=b620a0b1c7ae486e979826200e8e441605b0a5d6
• http://android.git.kernel.org/?p=platform/system/netd.git;a=commit;h=79b579c92afc08ab12c0a5788d61f2dd2934836f
• http://android.git.kernel.org/?p=platform/system/vold.git;a=commit;h=c51920c82463b240e2be0430849837d6fdc5352e
• http://androidcommunity.com/gingerbreak-root-for-gingerbread-app-20110421/
• http://c-skills.blogspot.com/2011/04/yummy-yummy-gingerbreak.html
• http://forum.xda-developers.com/showthread.php?t=1044765
• http://www.androidpolice.com/2011/05/03/google-patches-gingerbreak-exploit-but-dont-worry-we-still-have-root-for-now/
• http://xorl.wordpress.com/2011/04/28/android-vold-mpartminors-signedness-issue/
• https://exchange.xforce.ibmcloud.com/vulnerabilities/67977