Vulnerabilities
Misconfiguration
Runtime Security
Compliance
CVE Vulnerabilities

CVE-2016-4800

Improper Access Control

Published: Apr 13, 2017 | Modified: Oct 20, 2020
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
5 MODERATE
AV:N/AC:L/Au:N/C:P/I:N/A:N
RedHat/V3
Ubuntu
MEDIUM
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2016-4800
CWEhttps://cwe.mitre.org/data/definitions/284.html

The path normalization mechanism in PathResource class in Eclipse Jetty 9.3.x before 9.3.9 on Windows allows remote attackers to bypass protected resource restrictions and other security constraints via a URL with certain escaped characters, related to backslashes.

Weakness

The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Affected Software

Name Vendor Start Version End Version
Jetty Eclipse 9.3.0 (including) 9.3.0 (including)
Jetty Eclipse 9.3.0-m0 (including) 9.3.0-m0 (including)
Jetty Eclipse 9.3.0-m1 (including) 9.3.0-m1 (including)
Jetty Eclipse 9.3.0-maintenance2 (including) 9.3.0-maintenance2 (including)
Jetty Eclipse 9.3.0-rc0 (including) 9.3.0-rc0 (including)
Jetty Eclipse 9.3.0-rc1 (including) 9.3.0-rc1 (including)
Jetty Eclipse 9.3.1 (including) 9.3.1 (including)
Jetty Eclipse 9.3.2 (including) 9.3.2 (including)
Jetty Eclipse 9.3.3 (including) 9.3.3 (including)
Jetty Eclipse 9.3.4 (including) 9.3.4 (including)
Jetty Eclipse 9.3.4-rc0 (including) 9.3.4-rc0 (including)
Jetty Eclipse 9.3.4-rc1 (including) 9.3.4-rc1 (including)
Jetty Eclipse 9.3.5 (including) 9.3.5 (including)
Jetty Eclipse 9.3.6 (including) 9.3.6 (including)
Jetty Eclipse 9.3.7 (including) 9.3.7 (including)
Jetty Eclipse 9.3.7-rc0 (including) 9.3.7-rc0 (including)
Jetty Eclipse 9.3.7-rc1 (including) 9.3.7-rc1 (including)
Jetty Eclipse 9.3.8 (including) 9.3.8 (including)
Jetty Eclipse 9.3.8-rc0 (including) 9.3.8-rc0 (including)
Jetty9 Ubuntu upstream *

Extended Description

Access control involves the use of several protection mechanisms such as:

When any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc. There are two distinct behaviors that can introduce access control weaknesses:

Potential Mitigations

  • Compartmentalize the system to have “safe” areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
  • Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.

References

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