CVE-2016-7141

curl: Incorrect reuse of client certificates

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

curl and libcurl before 7.50.2, when built with NSS and the libnsspem.so library is available at runtime, allow remote attackers to hijack the authentication of a TLS connection by leveraging reuse of a previously loaded client certificate from file for a connection for which no certificate has been set, a different vulnerability than CVE-2016-5420.

curl y libcurl en versiones anteriores a 7.50.2, cuando se construye con NSS y la librería libnsspem.so está disponible en tiempo de ejecución, permiten a atacantes remotos secuestrar la autenticación de una conexión TLS aprovechando la reutilización de un certificado cliente cargado previamente desde un archivo para una conexión para el que no se ha configurado ningún certificado, una vulnerabilidad diferente a CVE-2016-5420.

It was found that the libcurl library using the NSS (Network Security Services) library as TLS/SSL backend incorrectly re-used client certificates for subsequent TLS connections in certain cases. An attacker could potentially use this flaw to hijack the authentication of the connection by leveraging a previously created connection with a different client certificate.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-09-05 CVE Reserved
2016-10-03 CVE Published
2023-03-07 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-287: Improper Authentication
CWE-295: Improper Certificate Validation

CAPEC

References (13)

URL	Tag	Source
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html	X_refsource_confirm
http://www.securityfocus.com/bid/92754	Third Party Advisory
http://www.securitytracker.com/id/1036739	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/11/msg00005.html	Mailing List

URL	Date	SRC

URL	Date	SRC
https://curl.haxx.se/docs/adv_20160907.html	2018-11-13
https://github.com/curl/curl/commit/curl-7_50_2~32	2018-11-13

URL	Date	SRC
http://lists.opensuse.org/opensuse-updates/2016-09/msg00094.html	2018-11-13
http://rhn.redhat.com/errata/RHSA-2016-2575.html	2018-11-13
http://rhn.redhat.com/errata/RHSA-2016-2957.html	2018-11-13
https://access.redhat.com/errata/RHSA-2018:3558	2018-11-13
https://bugzilla.redhat.com/show_bug.cgi?id=1373229	2018-11-13
https://security.gentoo.org/glsa/201701-47	2018-11-13
https://access.redhat.com/security/cve/CVE-2016-7141	2018-11-13

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				42.1 Search vendor "Opensuse" for product "Leap" and version "42.1"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				<= 7.50.1 Search vendor "Haxx" for product "Libcurl" and version " <= 7.50.1"		-		Affected