CVE-2023-23915
A cleartext transmission of sensitive information vulnerability exists in curl <v7.88.0 that could cause HSTS functionality to behave incorrectly when multiple URLs are requested in parallel. Using its HSTS support, curl can be instructed to use HTTPS instead of using an insecure clear-text HTTP step even when HTTP is provided in the URL. This HSTS mechanism would however surprisingly fail when multiple transfers are done in parallel as the HSTS cache file gets overwritten by the most recentlycompleted transfer. A later HTTP-only transfer to the earlier host name would then *not* get upgraded properly to HSTS.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2023-23915?
CVE-2023-23915 is a vulnerability in curl <v7.88.0 that allows cleartext transmission of sensitive information, causing HSTS functionality to behave incorrectly when multiple URLs are requested in parallel.
How does CVE-2023-23915 affect me?
If you are using curl <v7.88.0 and requesting multiple URLs in parallel, this vulnerability could expose sensitive information transmitted over clear-text HTTP.
What is the severity of CVE-2023-23915?
The severity of CVE-2023-23915 is medium, with a CVSS score of 6.5.
How can I fix CVE-2023-23915?
To fix the CVE-2023-23915 vulnerability, you need to update curl to version 7.88.0 or later.
Where can I find more information about CVE-2023-23915?
You can find more information about CVE-2023-23915 at the following references: [Link 1](https://curl.se/docs/CVE-2023-23915.html), [Link 2](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2170750), [Link 3](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2170749).