Vulnerability Details : CVE-2017-17671
Potential exploit
vBulletin through 5.3.x on Windows allows remote PHP code execution because a require_once call is reachable with an unauthenticated request that can include directory traversal sequences to specify an arbitrary pathname, and because ../ traversal is blocked but ..\ traversal is not blocked. For example, an attacker can make an invalid HTTP request containing PHP code, and then make an index.php?routestring= request with enough instances of ".." to reach an Apache HTTP Server log file.
Vulnerability category: Directory traversal
Products affected by CVE-2017-17671
- cpe:2.3:a:vbulletin:vbulletin:*:*:*:*:*:*:*:*
- cpe:2.3:a:vbulletin:vbulletin:5.0.0:beta_28:*:*:*:*:*:*
- cpe:2.3:a:vbulletin:vbulletin:5.0.0:beta_11:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-17671
1.95%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 88 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-17671
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2017-17671
-
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-17671
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https://blogs.securiteam.com/index.php/archives/3569
SSD Advisory – vBulletin routestring Unauthenticated Remote Code Execution - SSD Secure DisclosureExploit;Third Party Advisory
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