CVE-2020-15163
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.67%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 8.2 HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
- EPSS
- 0.67% probability · 50th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-863, CWE-345
- Affected
- linuxfoundation/the update framework
- Source
- security-advisories@github.com
References
- https://github.com/theupdateframework/tuf/commit/3d342e648fbacdf43a13d7ba8886aaaf07334af7Broken Link
- https://github.com/theupdateframework/tuf/pull/885Patch, Third Party Advisory
- https://github.com/theupdateframework/tuf/releases/tag/v0.12.0Third Party Advisory
- https://github.com/theupdateframework/tuf/security/advisories/GHSA-f8mr-jv2c-v8mgThird Party Advisory
- https://pypi.org/project/tufProduct, Vendor Advisory
- https://github.com/theupdateframework/tuf/commit/3d342e648fbacdf43a13d7ba8886aaaf07334af7Broken Link
- https://github.com/theupdateframework/tuf/pull/885Patch, Third Party Advisory
- https://github.com/theupdateframework/tuf/releases/tag/v0.12.0Third Party Advisory
- https://github.com/theupdateframework/tuf/security/advisories/GHSA-f8mr-jv2c-v8mgThird Party Advisory
- https://pypi.org/project/tufProduct, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.