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libcurl's URL API function [curl_url_get()](https://curl...

Low severity Unreviewed Published Jul 24, 2024 to the GitHub Advisory Database • Updated Sep 10, 2024

Package

No package listed— Suggest a package

Affected versions

Unknown

Patched versions

Unknown

Description

libcurl's URL API function
curl_url_get() offers punycode
conversions, to and from IDN. Asking to convert a name that is exactly 256
bytes, libcurl ends up reading outside of a stack based buffer when built to
use the macidn IDN backend. The conversion function then fills up the
provided buffer exactly - but does not null terminate the string.

This flaw can lead to stack contents accidently getting returned as part of
the converted string.

References

Published by the National Vulnerability Database Jul 24, 2024
Published to the GitHub Advisory Database Jul 24, 2024
Last updated Sep 10, 2024

Severity

Low

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS score

0.079%
(35th percentile)

Weaknesses

CVE ID

CVE-2024-6874

GHSA ID

GHSA-chhh-4xrf-42pg

Source code

No known source code

Dependabot alerts are not supported on this advisory because it does not have a package from a supported ecosystem with an affected and fixed version.

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