Feeds

Windows 0day could allow complete hijacking

Beware of malformed Browser Elections

  • alert
  • submit to reddit

Secure remote control for conventional and virtual desktops

Security researchers have warned of a new vulnerability afflicting older versions of Windows that could allow attackers to take complete control of machines running the operating systems.

The flaw in “BowserWriteErrorLogEntry()” function within the Windows mrxsmb.sys driver “could be exploited by remote attackers or malicious users to cause a denial of service or take complete control of a vulnerable system,” researchers from French security firm Vupen warned. The warning came after proof-of-concept code was posted on Monday to the Full-disclosure mailing list.

Attacks are triggered by sending vulnerable machines malformed Browser Election requests that cause a heap overflow in the mrxsmb.sys driver. The term “Browser” in this context doesn't refer to an application used for browsing websites, but rather, to networking technology used by older versions of Windows. The malformed Browser Election requests contain an “overly long Server Name string,” according to vulnerability tracking service Secunia, which has also weighed in on the the report.

Vupen, which rates the vulnerability as critical, has confirmed the bug in Windows Server 2003 SP2 and Windows XP SP3. Secunia rates it as moderately critical, the third most serious notch in its five-tier system.

A Microsoft spokesman said company researchers are investigating the reports and “will take appropriate action to help protect customers” when the inquiry is complete. ®

Update

Mark Wodrich of the Microsoft Security Response Center has blogged that the vulnerability doesn't allow attackers to remotely execute code on vulnerable 32-bit systems. Remote execution by be possible on vulnerable systems with 64 bits because they have 8GB of contiguous virtual address space mapped. The company is continuing to investigate.

New hybrid storage solutions

More from The Register

next story
Google recommends pronounceable passwords
Super Chrome goes into battle with Mr Mxyzptlk
Infosec geniuses hack a Canon PRINTER and install DOOM
Internet of Stuff securo-cockups strike yet again
Snowden, Dotcom, throw bombs into NZ election campaign
Claim of tapped undersea cable refuted by Kiwi PM as Kim claims extradition plot
Reddit wipes clean leaked celeb nudie pics, tells users to zip it
Now we've had all THAT TRAFFIC, we 'deplore' this theft
Apple Pay is a tidy payday for Apple with 0.15% cut, sources say
Cupertino slurps 15 cents from every $100 purchase
YouTube, Amazon and Yahoo! caught in malvertising mess
Cisco says 'Kyle and Stan' attack is spreading through compromised ad networks
TorrentLocker unpicked: Crypto coding shocker defeats extortionists
Lousy XOR opens door into which victims can shove a foot
prev story

Whitepapers

Secure remote control for conventional and virtual desktops
Balancing user privacy and privileged access, in accordance with compliance frameworks and legislation. Evaluating any potential remote control choice.
Saudi Petroleum chooses Tegile storage solution
A storage solution that addresses company growth and performance for business-critical applications of caseware archive and search along with other key operational systems.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.
Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.