Vulnerability Details : CVE-2020-15163

Python TUF (The Update Framework) reference implementation before version 0.12 it will incorrectly trust a previously downloaded root metadata file which failed verification at download time. This allows an attacker who is able to serve multiple new versions of root metadata (i.e. by a person-in-the-middle attack) culminating in a version which has not been correctly signed to control the trust chain for future updates. This is fixed in version 0.12 and newer.
Published 2020-09-09 18:15:22
Updated 2021-11-18 17:45:53
Source GitHub, Inc.
View at NVD,   CVE.org

Products affected by CVE-2020-15163

Exploit prediction scoring system (EPSS) score for CVE-2020-15163

EPSS FAQ
0.10%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 42 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-15163

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.9
 MEDIUM AV:N/AC:M/Au:S/C:P/I:P/A:N
6.8
4.9
 NIST
8.2
 HIGH CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
1.8
5.8
 NIST
8.7
 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
2.3
5.8
 GitHub, Inc.

CWE ids for CVE-2020-15163

  • The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.
    Assigned by: nvd@nist.gov (Primary)
  • The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
    Assigned by: security-advisories@github.com (Secondary)

References for CVE-2020-15163

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