Feeds

Secure phone app library vulnerable

SilentCircle, others need upgrades

Remote control for virtualized desktops

Users of a number of telephone apps need to upgrade, with a security researcher publishing research identifying serious vulnerabilities in ZRTPCCP, a core security library.

As ThreatPost notes, the compromised library counts PGP luminary Phil Zimmerman's SilentCircle secure comms application among its users.

Researcher Mark Dowd of Azimuth Security identified a variety of bugs including a remote heap overflow, a number of stack overflows, and information leakage.

The flaws exist in the GNU ZRTPCPP library. As well as SilentCircle, the library is used in LinPhone, CsipSimple, Twinkle, various Ostel clients, and “anything using the GNU ccRTP with ZRTP enabled”, Dowd writes.

The Zimmerman-designed ZRTP protocol is implemented in the library as part of the GNU secure telephony stack. It works by using an established RTP session to establish a cryptographically-protected authenticated session.

The first vulnerability exists in the Zrtp::storeMsgTemp() function, which can be crashed remotely by sending an over-sized packet, “leading to potential arbitrary code execution on the vulnerable host”.

The second vulnerability he identified is a number of functions that can be crashed with a remote heap overflow. However, Dowd was unsure as to whether this gave rise to an exploitable condition.

Finally, the library fails to validate whether a packet is of the expected size. “This can lead to both information leaking and out of bounds data reads (usually resulting in a crash)”, Dowd writes.

The good news is that the library has been updated in github, and a SilentCircle update is available in both the Android and Apple versions (via Google Play and the AppStore). ®

Internet Security Threat Report 2014

More from The Register

next story
'Regin': The 'New Stuxnet' spook-grade SOFTWARE WEAPON described
'A degree of technical competence rarely seen'
You really need to do some tech support for Aunty Agnes
Free anti-virus software, expires, stops updating and p0wns the world
You stupid BRICK! PCs running Avast AV can't handle Windows fixes
Fix issued, fingers pointed, forums in flames
Regin: The super-spyware the security industry has been silent about
NSA fingered as likely source of complex malware family
Privacy bods offer GOV SPY VICTIMS a FREE SPYWARE SNIFFER
Looks for gov malware that evades most antivirus
Patch NOW! Microsoft slings emergency bug fix at Windows admins
Vulnerability promotes lusers to domain overlords ... oops
HACKERS can DELETE SURVEILLANCE DVRS remotely – report
Hikvision devices wide open to hacking, claim securobods
prev story

Whitepapers

Why cloud backup?
Combining the latest advancements in disk-based backup with secure, integrated, cloud technologies offer organizations fast and assured recovery of their critical enterprise data.
Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
5 critical considerations for enterprise cloud backup
Key considerations when evaluating cloud backup solutions to ensure adequate protection security and availability of enterprise data.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Beginner's guide to SSL certificates
De-mystify the technology involved and give you the information you need to make the best decision when considering your online security options.