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Fencer Intel
critical 9.8

CVE-2020-35858 json

Out of bounds write in prost

published 6y ago modified 3mo ago also GHSA-gv73-9mwv-fwgq , RUSTSEC-2020-0002 , EUVD-2021-1729

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.4%
EPSS 3.4% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

An issue was discovered in the prost crate before 0.6.1 for Rust. There is stack consumption via a crafted message, causing a denial of service (e.g., x86) or possibly remote code execution (e.g., ARM).

Patch / fix

  • crates.io prost 0.6.1
  • prost_project prost 0.6.1

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Exploit prediction

3.40% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • rustsec.org https://rustsec.org/advisories/RUSTSEC-2020-0002.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 prost
<0.6.1
>=0.0.0-0, <0.6.1
0.6.1

Classification

Weakness

References

Sources

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.