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CVE-2023-28320

MEDIUMCVSS 5.9/10EPSS 2.66%

Last modified

CVE-2023-28320 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names, selected at build time. If it is built to use the synchronous resolver, it allows name resolves to time-out slow operations using `alarm()` and `siglongjmp()`. EPSS estimates a 2.66% chance of exploitation in the next 30 days.

Description

A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names, selected at build time. If it is built to use the synchronous resolver, it allows name resolves to time-out slow operations using `alarm()` and `siglongjmp()`. When doing this, libcurl used a global buffer that was not mutex protected and a multi-threaded application might therefore crash or otherwise misbehave.

Metrics

CVSS 3.1
5.9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
2.66%

83.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
HaxxCurl< 8.1.0
AppleMacos>= 11.0, < 11.7.9
AppleMacos>= 12.0, < 12.6.8
AppleMacos>= 13.0, < 13.5
NetappClustered Data OntapAll versions
NetappOntap Antivirus ConnectorAll versions
NetappH300s FirmwareAll versions
NetappH500s FirmwareAll versions
NetappH700s FirmwareAll versions
NetappH410s FirmwareAll versions

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2023-28320?
A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names, selected at build time. If it is built to use the synchronous resolver, it allows name resolves to time-out slow operations using `alarm()` and `siglongjmp()`. When doing this, libcurl used a global buffer that was not mutex protected and a multi-threaded application might therefore crash or otherwise misbehave.
How severe is CVE-2023-28320?
CVE-2023-28320 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 2.66% probability of exploitation in the next 30 days.
How do I fix CVE-2023-28320?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-28320?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST