CVE-2017-7418

Advisory lineage Upstream: 0 Downstream: 7
Modified
Published: 04 Apr 2017, 17:00
Last modified:05 Aug 2024, 16:04

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.0 (nvd)
EPSS Score
0.04% LOW
0% probability -0.03%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

04 Apr 2017, 17:00
Published
Vulnerability first disclosed
05 Aug 2024, 16:04
Last Modified
Vulnerability information updated

Description

ProFTPD before 1.3.5e and 1.3.6 before 1.3.6rc5 controls whether the home directory of a user could contain a symbolic link through the AllowChrootSymlinks configuration option, but checks only the last path component when enforcing AllowChrootSymlinks. Attackers with local access could bypass the AllowChrootSymlinks control by replacing a path component (other than the last one) with a symbolic link. The threat model includes an attacker who is not granted full filesystem access by a hosting provider, but can reconfigure the home directory of an FTP user.

CVSS Metrics

  • v3.0•MEDIUM•Score: 5.5CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
  • v2.0•LOW•Score: 2.1AV:L/AC:L/Au:N/C:N/I:P/A:N

EPSS Trends

Current EPSS score: 0.04%• Percentile: 12%

Techniques & Countermeasures

  • CWE-59•Improper Link Resolution Before File Access ('Link Following')

    The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Systems

  • proftpd•proftpd

    ≤ 1.3.5 | 1.3.6 | 1.3.6:rc1 | 1.3.6:rc2 | 1.3.6:rc3 | 1.3.6:rc4

References (8)