Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Vulnerabilities / Threats

8/18/2015
05:15 PM
Connect Directly
Twitter
RSS
E-Mail
50%
50%

Unpatched 'Tpwn' Mac OS X Bug Could Grant Root Privileges

Researchers beginning to find more cracks in Mac operating systems.

Just days after Apple patched a local privilege escalation vulnerability in OS X that would grant attackers root access, they are working to patch another one.

Sunday, Italian researcher Luca Todesco published proof-of-concept code to GitHub for "Tpwn," a memory corruption bug in the kernel of OS X versions 10.9.5 (Mavericks) through 10.10.5 (Yosemite). It does not affect the forthcoming version, OS X El Capitan, which is now in beta.

As Todesco explained to MacWorld, "The memory corruption condition can then be used to circumvent kernel address space layout randomization (kASLR), a defensive technique designed to thwart exploit code from running. The attacker then gains a root shell."

Todesco created a kernel extension called NULLGuard to protect against tpwn, but later recommended users instead install SUIDGuard, a TrustedBSD kernel extension created by Mac security researcher Stefan Esser.

Todesco published the code for Tpwn just hours after he disclosed the vulnerability to Apple, for which he has received some public criticism.   

Tpwn arrives just six days after Apple patched the DYLD_PRINT_TO_FILE vulnerability in OS X Yosemite discovered last month -- a bug in an environment variable that also enabled root access.

Other cracks were found in Mac OS X recently by Synack director of research Patrick Wardle. At Black Hat Las Vegas this month, Wardle revealed exploits he'd written that circumvents Gatekeeper, OS X's mechanism for preventing unsigned code from running. 

Sara Peters is Senior Editor at Dark Reading and formerly the editor-in-chief of Enterprise Efficiency. Prior that she was senior editor for the Computer Security Institute, writing and speaking about virtualization, identity management, cybersecurity law, and a myriad ... View Full Bio
 

Recommended Reading:

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
RyanSepe
50%
50%
RyanSepe,
User Rank: Ninja
8/19/2015 | 12:36:11 PM
Mac Security
Yes, this is interesting how it ties into what Patrick was saying in his interview with Dark Reading about remote code execution. Are we going to see a surge of mac oriented security initatives now? I dont think so because of the environment size but it seems to be getting much publicity of late.
Attackers Leave Stolen Credentials Searchable on Google
Kelly Sheridan, Staff Editor, Dark Reading,  1/21/2021
How to Better Secure Your Microsoft 365 Environment
Kelly Sheridan, Staff Editor, Dark Reading,  1/25/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win an Amazon Gift Card! Click Here
Latest Comment: We need more votes, check the obituaries.
Current Issue
2020: The Year in Security
Download this Tech Digest for a look at the biggest security stories that - so far - have shaped a very strange and stressful year.
Flash Poll
Assessing Cybersecurity Risk in Today's Enterprises
Assessing Cybersecurity Risk in Today's Enterprises
COVID-19 has created a new IT paradigm in the enterprise -- and a new level of cybersecurity risk. This report offers a look at how enterprises are assessing and managing cyber-risk under the new normal.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2021-21275
PUBLISHED: 2021-01-25
The MediaWiki "Report" extension has a Cross-Site Request Forgery (CSRF) vulnerability. Before fixed version, there was no protection against CSRF checks on Special:Report, so requests to report a revision could be forged. The problem has been fixed in commit f828dc6 by making use of Medi...
CVE-2021-21272
PUBLISHED: 2021-01-25
ORAS is open source software which enables a way to push OCI Artifacts to OCI Conformant registries. ORAS is both a CLI for initial testing and a Go Module. In ORAS from version 0.4.0 and before version 0.9.0, there is a "zip-slip" vulnerability. The directory support feature allows the ...
CVE-2021-23901
PUBLISHED: 2021-01-25
An XML external entity (XXE) injection vulnerability was discovered in the Nutch DmozParser and is known to affect Nutch versions < 1.18. XML external entity injection (also known as XXE) is a web security vulnerability that allows an attacker to interfere with an application's processing of XML ...
CVE-2020-17532
PUBLISHED: 2021-01-25
When handler-router component is enabled in servicecomb-java-chassis, authenticated user may inject some data and cause arbitrary code execution. The problem happens in versions between 2.0.0 ~ 2.1.3 and fixed in Apache ServiceComb-Java-Chassis 2.1.5
CVE-2020-12512
PUBLISHED: 2021-01-22
Pepperl+Fuchs Comtrol IO-Link Master in Version 1.5.48 and below is prone to an authenticated reflected POST Cross-Site Scripting