Vulnerability identifier: #VU31253

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-2634

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

It was found that the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation before 2.6.22.17 used the IPv4-only inet_sk_rebuild_header() function for both IPv4 and IPv6 DCCP connections, which could result in memory corruptions. A remote attacker could use this flaw to crash the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 2.6.22.1 - 2.6.22.16

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External links
http://rhn.redhat.com/errata/RHSA-2017-0323.html
http://rhn.redhat.com/errata/RHSA-2017-0346.html
http://rhn.redhat.com/errata/RHSA-2017-0347.html
http://www.securityfocus.com/bid/96529
http://www.securitytracker.com/id/1037909
http://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2634
http://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f53dc67c5e7babafe239b93a11678b0e05bead51

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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.