CVE-2018-15811
Published: 03 July 2019
Summary
CVE-2018-15811 is a high-severity Inadequate Encryption Strength (CWE-326) vulnerability in Dnnsoftware Dotnetnuke. Its CVSS base score is 7.5 (High).
Operationally, ranked in the top 0.2% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SC-13 (Cryptographic Protection) and SC-8 (Transmission Confidentiality and Integrity).
Deeper analysis
DNN (also known as DotNetNuke) versions 9.2 through 9.2.1 are affected by a vulnerability that stems from use of a weak encryption algorithm to protect input parameters, corresponding to CWE-326. The issue carries a CVSS 3.1 base score of 7.5, reflecting a network-accessible flaw with low attack complexity that requires no privileges or user interaction and results in high confidentiality impact.
An unauthenticated attacker can supply crafted input parameters protected only by the weak algorithm, potentially allowing recovery of sensitive data or further abuse such as cookie deserialization leading to remote code execution.
Public exploit material referencing cookie deserialization remote code execution has been published, and official advisories along with patches are referenced in the DNN security center and the project's GitHub releases.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2019-0590
Vulnerability details
DNN (aka DotNetNuke) 9.2 through 9.2.1 uses a weak encryption algorithm to protect input parameters.
- CWE(s)
- KEV Date Added
- 03 November 2021
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires use of approved cryptographic algorithms, preventing the weak encryption of input parameters that enables the described decryption and RCE attacks.
Enforces cryptographic protection of transmitted data confidentiality and integrity, mitigating exposure of weakly-encrypted input parameters or cookies.
Requires timely remediation of known flaws, directly addressing application of the published DNN patches that correct the weak-algorithm implementation.