Buffer overflow in Linux kernel - CVE-2017-2634

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Main Vulnerability Database Vulnerabilities #VU31253

Buffer overflow in Linux kernel - CVE-2017-2634

Published: July 27, 2018 / Updated: July 17, 2020


Vulnerability identifier: #VU31253
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-2634
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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.


Affected software

Linux kernel
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Server - AUS
kernel (Red Hat package)

How to mitigate CVE-2017-2634

Install update from vendor's website.

Linux kernel - update to 2.6.22.17
kernel (Red Hat package) - addressed in versions 2.6.18-238.58.1.el5, 2.6.18-348.33.1.el5, 2.6.18-419.el5

External References

Related Security Bulletins