Double Free in curl.haxx.se cURL



Published: 2018-07-31 | Updated: 2020-08-03
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2016-8618
CWE-ID CWE-415
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe
cURL
Client/Desktop applications / Other client software

Vendor curl.haxx.se

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Double Free

EUVDB-ID: #VU33017

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-8618

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

cURL: 7.1 - 7.50.3

External links

http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
http://www.securityfocus.com/bid/94098
http://www.securitytracker.com/id/1037192
http://access.redhat.com/errata/RHSA-2018:2486
http://access.redhat.com/errata/RHSA-2018:3558
http://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8618
http://curl.haxx.se/docs/adv_20161102D.html
http://security.gentoo.org/glsa/201701-47
http://www.tenable.com/security/tns-2016-21


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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