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CVE-2017-16038: Directory Traversal in f2e-server
Platform
nodejs
Component
f2e-server
Opgelost in
1.12.12
CVE-2017-16038 is a directory traversal vulnerability affecting versions of the f2e-server software prior to 1.12.12. This flaw allows attackers to navigate outside the intended directory root, potentially exposing sensitive files and data stored on the system. The vulnerability stems from the server's improper handling of relative file paths. An update to version 1.12.12 or later resolves this issue.
Impact en Aanvalsscenarioswordt vertaald…
Successful exploitation of CVE-2017-16038 allows an attacker to read arbitrary files from the server's file system. This includes potentially sensitive configuration files, source code, or even user data. The impact can range from information disclosure to complete system compromise, depending on the files accessible and the privileges of the user running the f2e-server process. The provided example request demonstrates how an attacker could use the ../ sequence to traverse up the directory structure and access files like /etc/passwd. While direct system takeover is unlikely without further vulnerabilities, the exposure of sensitive data poses a significant risk.
Uitbuitingscontextwordt vertaald…
CVE-2017-16038 was published on July 24, 2018. There is no indication of this vulnerability being actively exploited in the wild, nor is it currently listed on KEV or EPSS. Public proof-of-concept (POC) code is readily available, demonstrating the ease of exploitation. The CVSS score of 7.5 (HIGH) reflects the potential for significant impact, although the lack of active exploitation suggests a lower immediate threat.
Dreigingsinformatie
Exploit Status
EPSS
0.86% (75% percentiel)
CVSS-vector
Wat betekenen deze metrics?
- Attack Vector
- Netwerk — op afstand uitbuitbaar via internet. Geen fysieke of lokale toegang vereist.
- Attack Complexity
- Laag — geen speciale voorwaarden vereist. Betrouwbaar uitbuitbaar.
- Privileges Required
- Geen — geen authenticatie vereist om te exploiteren.
- User Interaction
- Geen — automatische en stille aanval. Slachtoffer doet niets.
- Scope
- Ongewijzigd — impact beperkt tot het kwetsbare component.
- Confidentiality
- Hoog — volledig verlies van vertrouwelijkheid. Aanvaller kan alle gegevens lezen.
- Integrity
- Geen — geen integriteitsimpact.
- Availability
- Geen — geen beschikbaarheidsimpact.
Tijdlijn
- Gepubliceerd
- Gewijzigd
- EPSS bijgewerkt
Mitigatie en Workaroundswordt vertaald…
The primary mitigation for CVE-2017-16038 is to upgrade f2e-server to version 1.12.12 or later. If an immediate upgrade is not possible due to compatibility issues or system downtime constraints, consider implementing a Web Application Firewall (WAF) rule to block requests containing directory traversal sequences (e.g., ../). Additionally, restrict file access permissions for the f2e-server user to only the necessary directories. Review and harden the server's configuration to minimize the potential impact of a successful attack. After upgrading, confirm the fix by attempting a directory traversal request (e.g., GET /../../../../../../../../../../etc/passwd HTTP/1.1) and verifying that it is blocked or returns an error.
Hoe te verhelpenwordt vertaald…
Geen officiële patch beschikbaar. Zoek naar tijdelijke oplossingen of monitor updates.
Veelgestelde vragenwordt vertaald…
What is CVE-2017-16038 — Directory Traversal in f2e-server?
CVE-2017-16038 is a vulnerability in f2e-server allowing attackers to access files outside the intended directory, potentially exposing sensitive data.
Am I affected by CVE-2017-16038 in f2e-server?
You are affected if you are running f2e-server versions prior to 1.12.12. Check your version and upgrade immediately.
How do I fix CVE-2017-16038 in f2e-server?
Upgrade to version 1.12.12 or later. As a temporary workaround, implement WAF rules to block directory traversal attempts.
Is CVE-2017-16038 being actively exploited?
There is no current evidence of active exploitation, but public POCs exist, making it a potential risk.
Where can I find the official f2e-server advisory for CVE-2017-16038?
Refer to the vendor's security advisory or relevant security databases for the official advisory regarding CVE-2017-16038.
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