Vulnerability identifier: #VU32262

Vulnerability risk: High

CVSSv3.1: 7.1 [AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-5421

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

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

Vendor: curl.haxx.se

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing unknown vectors. A attackers can control which connection is used or possibly have unspecified other impact.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation
Update to version 7.50.1.

Vulnerable software versions

cURL: 7.50.0

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External links
http://lists.opensuse.org/opensuse-updates/2016-09/msg00011.html
http://lists.opensuse.org/opensuse-updates/2016-09/msg00094.html
http://www.debian.org/security/2016/dsa-3638
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
http://www.securityfocus.com/bid/92306
http://www.securitytracker.com/id/1036536
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.563059
http://www.ubuntu.com/usn/USN-3048-1
http://access.redhat.com/errata/RHSA-2018:3558
http://curl.haxx.se/docs/adv_20160803C.html
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GLPXQQKURBQFM4XM6645VRPTOE2AWG33/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/K3GQH4V3XAQ5Z53AMQRDEC3C3UHTW7QR/
http://security.gentoo.org/glsa/201701-47
http://source.android.com/security/bulletin/2016-12-01.html
http://www.tenable.com/security/tns-2016-18

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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.