CVE-2018-8778

Advisory lineage Upstream: 0 Downstream: 18
Modified
Published: 03 Apr 2018, 22:00
Last modified:05 Aug 2024, 07:02

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.0 (nvd)
EPSS Score
0.54% LOW
1% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

03 Apr 2018, 22:00
Published
Vulnerability first disclosed
05 Aug 2024, 07:02
Last Modified
Vulnerability information updated

Description

In Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1, an attacker controlling the unpacking format (similar to format string vulnerabilities) can trigger a buffer under-read in the String#unpack method, resulting in a massive and controlled information disclosure.

CVSS Metrics

  • v3.0•HIGH•Score: 7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  • v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:P/I:N/A:N

EPSS Trends

Current EPSS score: 0.54%• Percentile: 68%

Techniques & Countermeasures

  • CWE-134•Use of Externally-Controlled Format String

    The product uses a function that accepts a format string as an argument, but the format string originates from an external source.

Affected Systems

  • canonical•ubuntu_linux

    14.04 | 16.04 | 17.10

  • debian•debian_linux

    7.0 | 8.0 | 9.0

  • redhat•enterprise_linux

    6.0 | 7.0 | 7.4 | 7.5 | 7.6

  • ruby-lang•ruby

    ≥ 2.2.0, < 2.2.10 | ≥ 2.3.0, < 2.3.7 | ≥ 2.4.0, < 2.4.4 | ≥ 2.5.0, < 2.5.1 | 2.6.0:preview1

References (17)