CVE-2016-8618

curl: Double-free in curl_maprintf

Severity Score

9.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The libcurl API function called `curl_maprintf()` before version 7.51.0 can be tricked into doing a double-free due to an unsafe `size_t` multiplication, on systems using 32 bit `size_t` variables.

La función API de libcurl llamada "curl_maprintf()" en versiones anteriores a la 7.51.0 puede ser engañada para realizar una doble liberación (double free) debido a una multiplicación "size_t" insegura en sistemas que utilizan variables "size_t" de 32 bits.

It was discovered that curl incorrectly reused client certificates when built with NSS. A remote attacker could possibly use this issue to hijack the authentication of a TLS connection. Nguyen Vu Hoang discovered that curl incorrectly handled escaping certain strings. A remote attacker could possibly use this issue to cause curl to crash, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-10-12 CVE Reserved
2016-11-04 CVE Published
2024-08-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-415: Double Free
CWE-416: Use After Free

CAPEC

References (11)

URL	Tag	Source
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html	X_refsource_confirm
http://www.securityfocus.com/bid/94098	Third Party Advisory
http://www.securitytracker.com/id/1037192	Third Party Advisory
https://www.tenable.com/security/tns-2016-21	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8618	2023-11-07
https://curl.haxx.se/docs/adv_20161102D.html	2023-11-07

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2018:2486	2023-11-07
https://access.redhat.com/errata/RHSA-2018:3558	2023-11-07
https://security.gentoo.org/glsa/201701-47	2023-11-07
https://access.redhat.com/security/cve/CVE-2016-8618	2018-11-13
https://bugzilla.redhat.com/show_bug.cgi?id=1388378	2018-11-13

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"				< 7.51.0 Search vendor "Haxx" for product "Curl" and version " < 7.51.0"		-		Affected