2018-01-22 | Crypto miners are everywhere, Orange Tsai’s GIF exploit, and Grawler

Monday, January 22

TOP STORY

• MIT: Greedy crypto miners are bigger threat than viruses or spyware. This statement based on a Checkpoint Research report that says crypto miners affect 55% of businesses worldwide.

HACKTIVITY

• Reflected XSS vulnerability in Database name field on installation screen [16 upvotes] - no bounty for this report to concrete5 by @sts.

• Information disclosure on paycard.rapida.ru [12 upvotes] - $100 bounty for this report to QIWI by @tikoo_sahil.

You can see all the latest and greatest disclosures and bounties on www.hackerone.com/hacktivity  

OTHER ARTICLES WE’RE READING

• Orange Tsai’s harmful GIF exploit: PHP CVE-2018-5711

• SEC tells funds to “pump the brakes” on crypto holdings

• Less than 10% of Gmail users have enabled two-factor authentication

• Are there long term implications of data breaches on a company's stock? Not really, report by Russell Lange and Eric W. Burger finds. Read Bruce Schneier’s thoughts.

• Long live playful exploration. #NotAnotherKaliTutorial

HACKING TOOLS AND TIPS

• Wapiti: open source python scanner + fuzzer

• Grawler: recursively walks object trees in a git database searching for "deleted" passwords, secrets, keys, and other sensitive information

• @jobertabma: Hackers, did you find a SQL injection in an ORDER BY clause and you're unable to guess the column names? Use CASE WHEN <query> THEN RAND() ELSE 1 END to extract data. It'll randomize the order when <query> evaluates to true and remain static when false.

• @bonsaiviking: #Nmap comes with 586 #NSE scripts. 148 of them are default (-sC) or version (-sV) scripts. The rest (438) have to be invoked directly or by category, so many folks don't use them. Here are my top 18 NSE scripts you should run in 2018: #DiscoveringNSE  

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The bug relied on the type conversion from int to unsigned char. As you can see:
If GetDataBlock_ return -1, scd->done in line 400 will set to True, and stop the while-loop. But it will never be executed because the definition of count is unsigned char, it’s always be a positive from 0 to 255. So the result is, one single GIF can make an infinite loop and exhausted the server resource.

Orange Tsai

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