ExpressionEngine version 2.x < 2.11.8 and version 3.x < 3.5.5 create an object signing token with weak entropy. Successfully guessing the token can lead to remote code execution.
Published 2017-06-22 21:29:00
Updated 2019-10-09 23:21:09
Source HackerOne
View at NVD,   CVE.org
Vulnerability category: Execute code

Products affected by CVE-2017-0897

Exploit prediction scoring system (EPSS) score for CVE-2017-0897

2.40%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 88 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2017-0897

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
MEDIUM AV:N/AC:L/Au:N/C:P/I:N/A:N
10.0
2.9
NIST
7.5
HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.9
3.6
NIST

CWE ids for CVE-2017-0897

  • The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.
    Assigned by: support@hackerone.com (Secondary)
  • The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2017-0897

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