CVE-2021-45709 json
Use of a Broken or Risky Cryptographic Algorithm in crypto2
published 2021-10-08 5 y ago modified 2026-06-17 4 mo ago also GHSA-9hfg-pxr6-q4vp , GHSA-pmcv-mgcf-rvxg , RUSTSEC-2021-0121 , EUVD-2022-0545
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 56%
- public exploits
- 0
- none known
Summary
An issue was discovered in the crypto2 crate through 2021-10-08 for Rust. During Chacha20 encryption and decryption, an unaligned read of a u32 may occur.
Exploit prediction
0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | crypto2 | <=0.1.2 >=0.0.0-0 |
no fix listed |
Classification
- Weakness
-
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
-
rustsec.org
/advisories/RUSTSEC-2021-0121.html
web, third-party-advisory, advisory
-
raw.githubusercontent.com
/rustsec/advisory-db/main/crates/crypto2/RUSTSEC-2021-0121.md
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-45709
advisory
-
github.com
/shadowsocks/crypto2/issues/27
web, report
-
github.com
/shadowsocks/crypto2
package
-
crates.io
/crates/crypto2
package
Sources
- CVE List CVE-2021-45709
- GitHub Advisory GHSA-9hfg-pxr6-q4vp
- GitHub Advisory GHSA-pmcv-mgcf-rvxg
- NVD CVE-2021-45709
- OSV RUSTSEC-2021-0121
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