CVE-2020-8231

curl: Expired pointer dereference via multi API with CURLOPT_CONNECT_ONLY option set

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Due to use of a dangling pointer, libcurl 7.29.0 through 7.71.1 can use the wrong connection when sending data.

Debido al uso de un puntero colgante, libcurl versiones 7.29.0 hasta 7.71.1, puede usar la conexión errónea cuando envía datos

A flaw was found in libcurl from versions 7.29.0 through 7.71.1. An application that performs multiple requests with libcurl's multi API, and sets the `CURLOPT_CONNECT_ONLY` option, might experience libcurl using the wrong connection. The highest threat from this vulnerability is to data confidentiality.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-01-28 CVE Reserved
2020-08-19 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-11-20 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-416: Use After Free
CWE-822: Untrusted Pointer Dereference

CAPEC

References (10)

URL	Tag	Source
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E	Mailing List

URL	Date	SRC
https://hackerone.com/reports/948876	2024-08-04

URL	Date	SRC
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf	2024-03-27
https://curl.haxx.se/docs/CVE-2020-8231.html	2024-03-27
https://www.oracle.com/security-alerts/cpuapr2022.html	2024-03-27

URL	Date	SRC
https://security.gentoo.org/glsa/202012-14	2024-03-27
https://www.debian.org/security/2021/dsa-4881	2024-03-27
https://access.redhat.com/security/cve/CVE-2020-8231	2021-05-18
https://bugzilla.redhat.com/show_bug.cgi?id=1868032	2021-05-18

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				>= 7.29.0 <= 7.71.1 Search vendor "Haxx" for product "Libcurl" and version " >= 7.29.0 <= 7.71.1"		-		Affected
Siemens Search vendor "Siemens"		Sinec Infrastructure Network Services Search vendor "Siemens" for product "Sinec Infrastructure Network Services"				< 1.0.1.1 Search vendor "Siemens" for product "Sinec Infrastructure Network Services" and version " < 1.0.1.1"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Oracle Search vendor "Oracle"		Communications Cloud Native Core Policy Search vendor "Oracle" for product "Communications Cloud Native Core Policy"				1.14.0 Search vendor "Oracle" for product "Communications Cloud Native Core Policy" and version "1.14.0"		-		Affected
Splunk Search vendor "Splunk"		Universal Forwarder Search vendor "Splunk" for product "Universal Forwarder"				>= 8.2.0 < 8.2.12 Search vendor "Splunk" for product "Universal Forwarder" and version " >= 8.2.0 < 8.2.12"		-		Affected
Splunk Search vendor "Splunk"		Universal Forwarder Search vendor "Splunk" for product "Universal Forwarder"				>= 9.0.0 < 9.0.6 Search vendor "Splunk" for product "Universal Forwarder" and version " >= 9.0.0 < 9.0.6"		-		Affected
Splunk Search vendor "Splunk"		Universal Forwarder Search vendor "Splunk" for product "Universal Forwarder"				9.1.0 Search vendor "Splunk" for product "Universal Forwarder" and version "9.1.0"		-		Affected