Vulnerability identifier: #VU33012

Vulnerability risk: Low

CVSSv3.1: 6.1 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-8617

CWE-ID: CWE-787

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
cURL
Client/Desktop applications / Other client software

Vendor: curl.haxx.se

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

The base64 encode function in curl before version 7.51.0 is prone to a buffer being under allocated in 32bit systems if it receives at least 1Gb as input via `CURLOPT_USERNAME`.

Mitigation
Install update from vendor's website.

Vulnerable software versions

cURL: 7.1 - 7.50.3

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External links
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
http://www.securityfocus.com/bid/94097
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-2016-8617
http://curl.haxx.se/CVE-2016-8617.patch
http://curl.haxx.se/docs/adv_20161102C.html
http://security.gentoo.org/glsa/201701-47
http://www.tenable.com/security/tns-2016-21

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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