CVE-2020-35902 json
Use-after-free in actix-codec
published 6y ago modified 4mo ago also GHSA-rqgx-hpg4-456r , RUSTSEC-2020-0049 , EUVD-2021-1876
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.6%
- EPSS 1.6% chance of exploitation in 30 days, percentile 76%
- public exploits
- 0
- none known
Summary
An issue was discovered in the actix-codec crate before 0.3.0-beta.1 for Rust. There is a use-after-free in Framed.
Patch / fix
Is CVE-2020-35902 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
1.65% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- rustsec.org https://rustsec.org/advisories/RUSTSEC-2020-0049.html referenced PoC, tagged "exploit" by a source, unverified
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 |
| OSV | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 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 | actix-codec | <0.3.0 >=0.0.0-0, <0.3.0-beta.1 |
0.3.0 0.3.0-beta.1 |
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
github.com
/actix/actix-net/commit/c41b5d8dd4235ccca84d0b687996615c0c64d956
web
-
rustsec.org
/advisories/RUSTSEC-2020-0049.html
web, exploit, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-35902
advisory
-
github.com
/actix/actix-net/issues/91
web, report
-
github.com
/actix/actix-net
package
-
crates.io
/crates/actix-codec
package
Sources
- CVE List CVE-2020-35902
- GitHub Advisory GHSA-rqgx-hpg4-456r
- NVD CVE-2020-35902
- OSV RUSTSEC-2020-0049
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.