CVE-2023-46218

curl: information disclosure by exploiting a mixed case flaw

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

This flaw allows a malicious HTTP server to set "super cookies" in curl that
are then passed back to more origins than what is otherwise allowed or
possible. This allows a site to set cookies that then would get sent to
different and unrelated sites and domains.

It could do this by exploiting a mixed case flaw in curl's function that
verifies a given cookie domain against the Public Suffix List (PSL). For
example a cookie could be set with `domain=co.UK` when the URL used a lower
case hostname `curl.co.uk`, even though `co.uk` is listed as a PSL domain.

Esta falla permite que un servidor HTTP malicioso establezca "supercookies" en curl que luego se devuelven a más orígenes de los que están permitidos o son posibles. Esto permite que un sitio establezca cookies que luego se enviarán a sitios y dominios diferentes y no relacionados. Podría hacer esto explotando una falla de mayúsculas y minúsculas en la función de curl que verifica un dominio de cookie determinado con Public Suffix List (PSL). Por ejemplo, una cookie podría configurarse con `domain=co.UK` cuando la URL utilizaba un nombre de host en minúscula `curl.co.uk`, aunque `co.uk` aparezca como un dominio PSL.

A flaw was found in curl that verifies a given cookie domain against the Public Suffix List. This issue could allow a malicious HTTP server to set "super cookies" in curl that are passed back to more origins than what is otherwise allowed or possible.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-10-19 CVE Reserved
2023-12-07 CVE Published
2024-08-02 CVE Updated
2024-08-02 First Exploit
2024-11-06 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-201: Insertion of Sensitive Information Into Sent Data

CAPEC

References (9)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2023/12/msg00015.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3ZX3VW67N4ACRAPMV2QS2LVYGD7H2MVE	Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UOGXU25FMMT2X6UUITQ7EZZYMJ42YWWD
https://security.netapp.com/advisory/ntap-20240125-0007
https://www.debian.org/security/2023/dsa-5587

URL	Date	SRC
https://hackerone.com/reports/2212193	2024-08-02

URL	Date	SRC
https://curl.se/docs/CVE-2023-46218.html	2024-01-25

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2023-46218	2024-05-01
https://bugzilla.redhat.com/show_bug.cgi?id=2252030	2024-05-01

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				>= 7.46.0 <= 8.4.0 Search vendor "Haxx" for product "Curl" and version " >= 7.46.0 <= 8.4.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				39 Search vendor "Fedoraproject" for product "Fedora" and version "39"		-		Affected