Vulnerabilities
Misconfiguration
Runtime Security
Compliance
CVE Vulnerabilities

CVE-2016-4859

URL Redirection to Untrusted Site ('Open Redirect')

Published: May 12, 2017 | Modified: May 19, 2017
CVSS 3.x
6.1
MEDIUM
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 2.x
5.8 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:N
RedHat/V2
RedHat/V3
Ubuntu
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2016-4859
CWEhttps://cwe.mitre.org/data/definitions/601.html

Open redirect vulnerability in Splunk Enterprise 6.4.x prior to 6.4.3, Splunk Enterprise 6.3.x prior to 6.3.6, Splunk Enterprise 6.2.x prior to 6.2.10, Splunk Enterprise 6.1.x prior to 6.1.11, Splunk Enterprise 6.0.x prior to 6.0.12, Splunk Enterprise 5.0.x prior to 5.0.16 and Splunk Light prior to 6.4.3 allows to redirect users to arbitrary web sites and conduct phishing attacks via unspecified vectors.

Weakness

A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks.

Affected Software

Name Vendor Start Version End Version
Splunk Splunk * 6.4.2 (including)
Splunk Splunk 5.0.0 (including) 5.0.0 (including)
Splunk Splunk 5.0.1 (including) 5.0.1 (including)
Splunk Splunk 5.0.2 (including) 5.0.2 (including)
Splunk Splunk 5.0.3 (including) 5.0.3 (including)
Splunk Splunk 5.0.4 (including) 5.0.4 (including)
Splunk Splunk 5.0.5 (including) 5.0.5 (including)
Splunk Splunk 5.0.6 (including) 5.0.6 (including)
Splunk Splunk 5.0.7 (including) 5.0.7 (including)
Splunk Splunk 5.0.8 (including) 5.0.8 (including)
Splunk Splunk 5.0.9 (including) 5.0.9 (including)
Splunk Splunk 5.0.10 (including) 5.0.10 (including)
Splunk Splunk 5.0.11 (including) 5.0.11 (including)
Splunk Splunk 5.0.12 (including) 5.0.12 (including)
Splunk Splunk 5.0.13 (including) 5.0.13 (including)
Splunk Splunk 5.0.14 (including) 5.0.14 (including)
Splunk Splunk 5.0.15 (including) 5.0.15 (including)
Splunk Splunk 6.0.0 (including) 6.0.0 (including)
Splunk Splunk 6.0.1 (including) 6.0.1 (including)
Splunk Splunk 6.0.2 (including) 6.0.2 (including)
Splunk Splunk 6.0.3 (including) 6.0.3 (including)
Splunk Splunk 6.0.4 (including) 6.0.4 (including)
Splunk Splunk 6.0.5 (including) 6.0.5 (including)
Splunk Splunk 6.0.6 (including) 6.0.6 (including)
Splunk Splunk 6.0.7 (including) 6.0.7 (including)
Splunk Splunk 6.0.8 (including) 6.0.8 (including)
Splunk Splunk 6.0.9 (including) 6.0.9 (including)
Splunk Splunk 6.0.10 (including) 6.0.10 (including)
Splunk Splunk 6.0.11 (including) 6.0.11 (including)
Splunk Splunk 6.1.0 (including) 6.1.0 (including)
Splunk Splunk 6.1.1 (including) 6.1.1 (including)
Splunk Splunk 6.1.2 (including) 6.1.2 (including)
Splunk Splunk 6.1.3 (including) 6.1.3 (including)
Splunk Splunk 6.1.4 (including) 6.1.4 (including)
Splunk Splunk 6.1.5 (including) 6.1.5 (including)
Splunk Splunk 6.1.6 (including) 6.1.6 (including)
Splunk Splunk 6.1.7 (including) 6.1.7 (including)
Splunk Splunk 6.1.8 (including) 6.1.8 (including)
Splunk Splunk 6.1.9 (including) 6.1.9 (including)
Splunk Splunk 6.1.10 (including) 6.1.10 (including)
Splunk Splunk 6.2.0 (including) 6.2.0 (including)
Splunk Splunk 6.2.1 (including) 6.2.1 (including)
Splunk Splunk 6.2.2 (including) 6.2.2 (including)
Splunk Splunk 6.2.3 (including) 6.2.3 (including)
Splunk Splunk 6.2.4 (including) 6.2.4 (including)
Splunk Splunk 6.2.5 (including) 6.2.5 (including)
Splunk Splunk 6.2.6 (including) 6.2.6 (including)
Splunk Splunk 6.2.7 (including) 6.2.7 (including)
Splunk Splunk 6.2.8 (including) 6.2.8 (including)
Splunk Splunk 6.2.9 (including) 6.2.9 (including)
Splunk Splunk 6.3.0 (including) 6.3.0 (including)
Splunk Splunk 6.3.1 (including) 6.3.1 (including)
Splunk Splunk 6.3.2 (including) 6.3.2 (including)
Splunk Splunk 6.3.3 (including) 6.3.3 (including)
Splunk Splunk 6.3.4 (including) 6.3.4 (including)
Splunk Splunk 6.3.5 (including) 6.3.5 (including)
Splunk Splunk 6.4.0 (including) 6.4.0 (including)
Splunk Splunk 6.4.1 (including) 6.4.1 (including)

Potential Mitigations

  • Assume all input is malicious. Use an “accept known good” input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
  • When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, “boat” may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as “red” or “blue.”
  • Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code’s environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
  • Use a list of approved URLs or domains to be used for redirection.
  • When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.
  • For example, ID 1 could map to “/login.asp” and ID 2 could map to “http://www.example.com/". Features such as the ESAPI AccessReferenceMap [REF-45] provide this capability.
  • Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide data to the application. Remember that such inputs may be obtained indirectly through API calls.
  • Many open redirect problems occur because the programmer assumed that certain inputs could not be modified, such as cookies and hidden form fields.

References

Aqua Security is the largest pure-play cloud native security company, providing customers the freedom to innovate and run their businesses with minimal friction. The Aqua Cloud Native Security Platform provides prevention, detection, and response automation across the entire application lifecycle to secure the build, secure cloud infrastructure and secure running workloads wherever they are deployed.
Copyright © 2024 Aqua Security Software Ltd.   Privacy Policy | Terms of Use