CVE-2021-43620: An issue was discovered in the fruity crate through 0.2.0 for Rust

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2021-43620 is a high-severity flaw (CVSS 7.5) affecting fruity. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in the fruity crate through 0.2.0 for Rust. Security-relevant validation of filename extensions is plausibly affected. Methods of NSString for conversion to a string may return a partial result. Because they call CStr::from_ptr on a pointer to the string buffer, the string is terminated at the first '\0' byte, which might not be the end of the string.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Published	2021-11-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: fruity project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-11-15 05:15 UTCPublished CVE record published
2026-06-17 04:11 UTCUpdated Record last modified

fruity project fruity DOWNGRADE

Affected: 0.1.0 · 0.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.1.0

1. Check installed version

apt-cache policy fruity || rpm -q fruity || fruity --version

2. No fixed release: DOWNGRADE to a release before 0.1.0 (Debian / Ubuntu)

apt-cache madison fruity sudo apt install fruity=<VERSION_BEFORE_0.1.0> sudo apt-mark hold fruity

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list fruity sudo dnf downgrade fruity-<VERSION_BEFORE_0.1.0> sudo dnf versionlock add fruity

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-43620?

fruity: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-43620 being exploited?

CVE-2021-43620 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-43620 affect?

CVE-2021-43620 affects fruity. Severity is high (CVSS 7.5). An issue was discovered in the fruity crate through 0.2.0 for Rust. Security-relevant validation of filename extensions is plausibly affected. Methods of NSString for conversion to a string may return a partial result. Because they call CSt

How urgent is CVE-2021-43620?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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