Risk
9/7/2010
01:05 PM
George V. Hulme
George V. Hulme
Commentary
50%
50%

Twitter Hit With Another Cross-Site Scripting Vulnerability

Over this Labor Day weekend developers at Twitter had to do a bit of additional labor that they should have previously completed - and that's to close a potentially dangerous cross-site scripting (XSS) vulnerability before things slid out of hand.

Over this Labor Day weekend developers at Twitter had to do a bit of additional labor that they should have previously completed - and that's to close a potentially dangerous cross-site scripting (XSS) vulnerability before things slid out of hand.According to the XSSed project, a researcher who goes by the handle "cbr" found and announced an XSS vulnerability on Twitter's site on July 29, 2010. The flaw had gone unfixed ever since.

That is until security researcher Mike Bailey, using the flaw, crafted a proof-of-concept exploit that created a rogue message posting from any account of any logged-in Twitter user who happened to click on a specially crafted button.

Real quickly, an XSS vulnerability is a web application vulnerability that makes it possible to inject client-side scripts into web pages.

In his post, Bailey described these types of XSS flaws as brutally simple to exploit. Just the type of flaw one would expect to be caught in development:

It may surprise some, but I really haven't been big on XSS lately, mostly because it's a problem that hasn't changed for years, and the most basic form of it is still brutally simple to exploit. Not a lot of excitement in it, I guess. But that doesn't mean that it doesn't deserve attention- in fact, that's exactly why it does. So when a new Twitter XSS popped up on my feed reader this morning, I took the 10 minutes it takes to write a proof of concept, and put together an exploit.

Over the summer a number of other XSS flaws have been reported, and fixed, to Twitter, including one on the main Twitter.com and support.twitter.com Web pages.

Now, within about 12 hours of Bailey posting his proof-of-concept, Twitter fixed the flaw. That's not bad time. However, it had been more than four weeks since the flaw was first made public: and that's atrocious for something they obviously could have fixed much, much more quickly.

It's time for Twitter to step up the quality control of its development processes.

Nonetheless, the flaws haven't managed to keep me away. For my security and technology observations throughout the day, you can find me on Twitter.

Comment  | 
Print  | 
More Insights
Register for Dark Reading Newsletters
White Papers
Cartoon
Current Issue
Dark Reading Tech Digest, Dec. 19, 2014
Software-defined networking can be a net plus for security. The key: Work with the network team to implement gradually, test as you go, and take the opportunity to overhaul your security strategy.
Flash Poll
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2014-8142
Published: 2014-12-20
Use-after-free vulnerability in the process_nested_data function in ext/standard/var_unserializer.re in PHP before 5.4.36, 5.5.x before 5.5.20, and 5.6.x before 5.6.4 allows remote attackers to execute arbitrary code via a crafted unserialize call that leverages improper handling of duplicate keys w...

CVE-2013-4440
Published: 2014-12-19
Password Generator (aka Pwgen) before 2.07 generates weak non-tty passwords, which makes it easier for context-dependent attackers to guess the password via a brute-force attack.

CVE-2013-4442
Published: 2014-12-19
Password Generator (aka Pwgen) before 2.07 uses weak pseudo generated numbers when /dev/urandom is unavailable, which makes it easier for context-dependent attackers to guess the numbers.

CVE-2013-7401
Published: 2014-12-19
The parse_request function in request.c in c-icap 0.2.x allows remote attackers to cause a denial of service (crash) via a URI without a " " or "?" character in an ICAP request, as demonstrated by use of the OPTIONS method.

CVE-2014-2026
Published: 2014-12-19
Cross-site scripting (XSS) vulnerability in the search functionality in United Planet Intrexx Professional before 5.2 Online Update 0905 and 6.x before 6.0 Online Update 10 allows remote attackers to inject arbitrary web script or HTML via the request parameter.

Best of the Web
Dark Reading Radio
Archived Dark Reading Radio
Join us Wednesday, Dec. 17 at 1 p.m. Eastern Time to hear what employers are really looking for in a chief information security officer -- it may not be what you think.