CVE-2015-3421
Description:
High-Tech Bridge Security Research Lab discovered a security vulnerability in the eShop WordPress Plugin, which can be exploited by remote attackers to overwrite arbitrary PHP variables within the context of the vulnerable application. The vulnerability exists due to insufficient validation of user-supplied input in the "eshopcart" HTTP cookie. Successful exploitation of this vulnerability may potentially result in arbitrary PHP code execution.
- Product: eShop WordPress plugin
- Vendor: Rich Pedley
- Vulnerable Version(s): 6.3.11 and probably prior
- Tested Version: 6.3.11
- Advisory Publication: April 15, 2015 [without technical details]
- Vendor Notification: April 15, 2015
- Public Disclosure: May 6, 2015
- Vulnerability Type: Code Injection [CWE-94]
- CVE Reference: CVE-2015-3421
- Risk Level: Medium
- CVSSv2 Base Score: 6.4 (AV:N/AC:L/Au:N/C:P/I:P/A:N)
- Discovered and Provided: High-Tech Bridge Security Research Lab ( [url]https://www.htbridge.com/advisory/[/url] )
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Advisory Details:
High-Tech Bridge Security Research Lab discovered security vulnerability in eShop WordPress Plugin, which can be exploited by remote attacker to overwrite arbitrary PHP variables within the context of the vulnerable application. The vulnerability exists due to insufficient validation of user-supplied input in "eshopcart" HTTP cookie. Successful exploitation of this vulnerability may potentially result in arbitrary PHP code execution (RCE).
Often such type of vulnerabilities lead to RCE, however in this case we can only overwrite string variables within the scope of 'eshop_checkout()' function in '/wp-content/plugins/eshop/checkout.php' file. This reduces our current vectors of exploitation to Full Path Disclosure and Cross-Site Scripting.
Below is a simple PoC that overwrites contents of the "wpdb" PHP variable, which causes an error in code and discloses full installation path:
[PHP] 纯文本查看 复制代码 GET /shopping-cart-2/checkout/ HTTP/1.1
Cookie: eshopcart=wpdb%3d1%7C;
Another PoC triggers the XSS vector and executes JS pop-up box displaying "ImmuniWeb":
[PHP] 纯文本查看 复制代码 GET /shopping-cart-2/checkout/ HTTP/1.1
Cookie: eshopcart=phone%3dsdfg'"><script>alert(/ImmuniWeb/)</script>
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Solution:
Disclosure timeline:
2015-04-15 Vendor Alerted via contact form and thread in support forum, no reply.
2015-04-29 Vendor Alerted via contact form and emails, no reply.
2015-05-05 Fix Requested via contact form and emails, no reply.
2015-05-06 Public disclosure.
Currently we are not aware of any official solution for this vulnerability.
[2015-05-07] # | 
发表于 2015-5-7 12:29:47
发表于 2015-5-11 22:57:30
