Vulnerability in Rust-Lang Rust
CVE-2020-36323
In the standard library in Rust before 1.52.0, there is an optimization for joining strings that can cause uninitialized bytes to be exposed (or the program to crash) if the borrowed string changes after its length is checked.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.
EPSS exploit prediction
EPSS: 0.020 (80.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 80.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- Rust-Lang Rust
- Fedoraproject Fedora — versions 32, 33, 34
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/rust-lang/rust/issues/80335 (Patch, Third Party Advisory)
- github.com/rust-lang/rust/pull/81728 (Patch, Third Party Advisory)
- github.com/rust-lang/rust/pull/81728 (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- github.com/rust-lang/rust/pull/81728 (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2020-36323?
- CVE-2020-36323 is a high-severity vulnerability in Rust-Lang Rust, classified under Use of Externally-Controlled Format String. CVSS score: 8.2/10. Published 2021-04-14.
- How severe is CVE-2020-36323?
- High severity. CVSS v3 base score is 8.2 out of 10.
- Is CVE-2020-36323 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.