Buffer overflow in Crossbeam Project
CVE-2020-15254
Crossbeam is a set of tools for concurrent programming. In crossbeam-channel before version 0.4.4, the bounded channel incorrectly assumes that `Vec::from_iter` has allocated capacity that same as the number of iterator elements. `Vec::from_iter` does not actually guarantee that and may allocate extra memory. The destructor of the `bounded` channel reconstructs `Vec` from the raw pointer based on the incorrect assumes described above. This is unsound and causing deallocation with the incorrect capacity when `Vec::from_iter` has allocated different sizes with the number of iterator elements. This has been fixed in crossbeam-channel 0.4.4.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.027 (85.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.028 · newest: 0.027 · change: -0.001
Affected products
- Crossbeam Project
- Crossbeam-Rs Crossbeam — versions < 0.4.4
Weakness classification (CWE)
References
- github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-v5m7-53cv-f3hx (Third Party Advisory)
- github.com/crossbeam-rs/crossbeam/issues/539 (Exploit, Third Party Advisory)
- github.com/crossbeam-rs/crossbeam/pull/533 (Exploit, Patch, Third Party Advisory)
- github.com/RustSec/advisory-db/pull/425 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-15254?
- CVE-2020-15254 is a high-severity vulnerability in Crossbeam Project, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.1/10. Published 2020-10-16.
- How severe is CVE-2020-15254?
- High severity. CVSS v3 base score is 8.1 out of 10.