PT-2018-6613 · Arista+7 · Veos+7
Published
2017-07-06
·
Updated
2025-01-03
·
CVE-2017-18017
CVSS v2.0
10
Critical
| Vector | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Name of the Vulnerable Software and Affected Versions:
Linux kernel versions prior to 4.11
Linux kernel versions 4.9.x prior to 4.9.36
Description:
The issue is related to the
tcpmss mangle packet function in the Linux kernel, which allows remote attackers to cause a denial of service or possibly have other impacts by leveraging the presence of xt TCPMSS in an iptables action. This can lead to a use-after-free and memory corruption. In the context of Arista's vEOS router software, this vulnerability can cause the instance to crash and potentially allow arbitrary code execution when iptables rules with TCPMSS action are configured.Recommendations:
For Linux kernel versions prior to 4.11, update to version 4.11 or later.
For Linux kernel versions 4.9.x prior to 4.9.36, update to version 4.9.36 or later.
As a temporary workaround, consider disabling the
tcpmss mangle packet function until a patch is available.
Restrict access to the xt TCPMSS module to minimize the risk of exploitation.Exploit
Fix
DoS
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Centos
Linux Kernel
Red Hat
Suse
Ubuntu
Iptables
Veos