CVE-2023-38546

Publication date 11 October 2023

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

3.7 · Low

Score breakdown

This flaw allows an attacker to insert cookies at will into a running program using libcurl, if the specific series of conditions are met. libcurl performs transfers. In its API, an application creates "easy handles" that are the individual handles for single transfers. libcurl provides a function call that duplicates en easy handle called [curl_easy_duphandle](https://curl.se/libcurl/c/curl_easy_duphandle.html). If a transfer has cookies enabled when the handle is duplicated, the cookie-enable state is also cloned - but without cloning the actual cookies. If the source handle did not read any cookies from a specific file on disk, the cloned version of the handle would instead store the file name as `none` (using the four ASCII letters, no quotes). Subsequent use of the cloned handle that does not explicitly set a source to load cookies from would then inadvertently load cookies from a file named `none` - if such a file exists and is readable in the current directory of the program using libcurl. And if using the correct file format of course.

Read the notes from the security team

Why is this CVE low priority?

Per upstream, this is a low-severity issue

Learn more about Ubuntu priority

Status

Package Ubuntu Release Status
curl 24.10 oracular
Fixed 8.2.1-1ubuntu3.1
24.04 LTS noble
Fixed 8.2.1-1ubuntu3.1
23.10 mantic
Fixed 8.2.1-1ubuntu3.1
23.04 lunar
Fixed 7.88.1-8ubuntu2.3
22.04 LTS jammy
Fixed 7.81.0-1ubuntu1.14
20.04 LTS focal
Fixed 7.68.0-1ubuntu2.20
18.04 LTS bionic
16.04 LTS xenial
14.04 LTS trusty

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Notes

mdeslaur

introduced in https://github.com/curl/curl/commit/74d5a6fb3b9a96d9f

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
curl

Severity score breakdown

Parameter Value
Base score 3.7 · Low
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

References

Related Ubuntu Security Notices (USN)

Other references