Home/CVE/In the standard library in Rust before 1.52.0, there is an optimization for joining strings that can cause uninitialized
CVE

CVE-2020-36323

In the standard library in Rust before 1.52.0, there is an optimization for joining strings that can cause uninitialized

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.

HIGH · CVSS 8.2 EPSS 0.01012
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-134Use of Externally-Controlled Format String
▤

Affected Products & Versions

2
rust-lang rust< 1.52.0
fedoraproject fedoraall versions
▣

Scoring & Timeline

8.2
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD14 Apr 2021 · 07:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
⚑

Vendor Advisories

3
msrcCVE-2020-36323
rhsaRHSA-2021:3042Moderate
rhsaRHSA-2021:3063Moderate
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/rust-lang/rust/issues/80335PatchThird Party Advisory
https://github.com/rust-lang/rust/pull/81728PatchThird Party Advisory
https://github.com/rust-lang/rust/pull/81728#issuecomment-821549174PatchThird Party Advisory
https://github.com/rust-lang/rust/pull/81728#issuecomment-824904190PatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CZ337CM4GFJLRDFVQCGC7J25V65JXOG5/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TFUO3URYCO73D2Q4WYJBWAMJWGGVXQO4/
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