Auth bypass in Linuxfoundation The Update Framework
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.
Vulnerability class: Broken Access Control
EPSS: 0.007 (48.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.
Affected products
- Linuxfoundation The_update_framework
- Theupdateframework Tuf — versions < 0.12
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Vendor Advisory)
- security-advisories@github.com (x_refsource_CONFIRM, Broken Link)
Frequently asked questions
- What is CVE-2020-15163?
- CVE-2020-15163 is a high-severity vulnerability in Linuxfoundation The Update Framework, classified under Incorrect Authorization. CVSS score: 8.7/10. Published 2020-09-09.
- How severe is CVE-2020-15163?
- High severity. CVSS v3 base score is 8.7 out of 10.
- Is CVE-2020-15163 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.