CVE-2017-5539: Path Traversal
The patch for directory traversal (CVE-2017-5480) in b2evolution version 6.8.4-stable has a bypass vulnerability. An attacker can use ..\/ to bypass the filter rule. Then, this attacker can exploit this vulnerability to delete or read any files on the server. It can also be used to determine whether a file exists.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
b2evolutionto a version that resolves this vulnerability.Fixed in 6.8.4-stablePatch CVE-2017-5480 - Operational
After addressing the directory traversal bypass for CVE-2017-5480 in b2evolution, check the server for any files that may have been deleted or read due to exploitation.
Event History
Frequently Asked Questions
What is the severity of CVE-2017-5539?
CVE-2017-5539 has a high severity rating due to the potential for file deletion and unauthorized file access.
How do I fix CVE-2017-5539?
To fix CVE-2017-5539, upgrade b2evolution to version 6.8.5 or later.
What types of attacks can exploit CVE-2017-5539?
CVE-2017-5539 can be exploited for directory traversal attacks enabling unauthorized file reading or deletion.
Is CVE-2017-5539 related to any other vulnerabilities?
CVE-2017-5539 is related to CVE-2017-5480, which addressed directory traversal but was bypassed.
What software versions are affected by CVE-2017-5539?
CVE-2017-5539 affects b2evolution version 6.8.4.