Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2017-9785

Deserialization of Untrusted Data

Published: Jul 20, 2017 | Modified: Apr 20, 2025
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
RedHat/V3
Ubuntu
Vulnerability-free packages from our partners
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2017-9785
CWEhttps://cwe.mitre.org/data/definitions/502.html

Csrf.cs in NancyFX Nancy before 1.4.4 and 2.x before 2.0-dangermouse has Remote Code Execution via Deserialization of JSON data in a CSRF Cookie.

Weakness

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Software

Name Vendor Start Version End Version
Nancy Nancyfx * 1.4.3 (including)
Nancy Nancyfx 2.0.0-alpha (including) 2.0.0-alpha (including)
Nancy Nancyfx 2.0.0-barneyrubble (including) 2.0.0-barneyrubble (including)
Nancy Nancyfx 2.0.0-clinteastwood (including) 2.0.0-clinteastwood (including)

Potential Mitigations

  • Make fields transient to protect them from deserialization.
  • An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

References

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