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No exploitation reportedFix available

CVE-2020-36317

No exploitation reported by the sources we read.

  • Published2021-04-11
  • Fixed in1.49.0
  • WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In the standard library in Rust before 1.49.0, String::retain() function has a panic safety problem. It allows creation of a non-UTF-8 Rust string when the provided closure panics. This bug could result in a memory safety violation when other string APIs assume that UTF-8 encoding is used on the same string.

Timeline

dates in UTC
  1. 2021-04-1120:15CVE publishedNVD

Versions per branch

NVD
Rust-lang rust
BranchAffectedFixed in
1.49< 1.49.01.49.0

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • rustRocky Linux:8all versions · fixed in 0:1.49.0-1.module+el8.4.0+416+259a129aand 1 other package
  • rustRed Hat:enterprise_linux:8::appstreamall versions · fixed in 0:1.49.0-1.module+el8.4.0+9446+1a463e08and 19 other packages
  • rustopenEuler:20.03-LTS-SP1all versions · fixed in 1.51.0-1.oe1
  • rust-toolset-1.49Red Hat:devtools:2021all versions · fixed in 0:1.49.0-1.el7_9and 16 other packages
  • rustcUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • rustcUbuntu:Pro:14.04:LTSall versions · no fixed version listed
  • rustcUbuntu:20.04:LTSall versions · fixed in 1.51.0+dfsg1+llvm-1~exp3ubuntu1~20.04.2
  • rustcDebian:14all versions · fixed in 1.53.0+dfsg1-1

2 more package ranges on OSV.dev

Vendor advisories

  • CVE-2020-36317 Red Hat Product Security175 products fixed

    rust: memory safety violation in String::retain()

  • RHSA-2021:2243 Red Hat Product Security73 products fixed

    Red Hat Security Advisory: rust-toolset-1.49 and rust-toolset-1.49-rust update

  • RHSA-2021:1935 Red Hat Product Security67 products fixed

    Red Hat Security Advisory: rust-toolset:rhel8 security, bug fix, and enhancement update

Full record on NVD

Fix

  1. Update Rust-lang rust to 1.49.0
  2. Vendor fix Red Hat Product Security RHSA-2021:2243 · 73 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2021-04-11
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-jc5q-p9cv-j8pj

Frequently asked questions

What is CVE-2020-36317?

In the standard library in Rust before 1.49.0, String::retain() function has a panic safety problem. It allows creation of a non-UTF-8 Rust string when the provided closure panics. This bug could result in a memory safety violation when other string APIs assume that UTF-8 encoding is used on the same string.

Is CVE-2020-36317 actively exploited?

Active exploitation of CVE-2020-36317 has not been confirmed. Its EPSS score was 1.5% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-36317?

CVE-2020-36317 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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