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Out-of-Bounds Affecting kernel-rt-debug package, versions <0:3.10.0-862.rt56.804.el7

Severity

 Recommended
high

Based on CentOS security rating

    Threat Intelligence

    EPSS
    95.39% (100th percentile)

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  • Snyk ID SNYK-CENTOS7-KERNELRTDEBUG-2099941
  • published 26 Jul 2021
  • disclosed 3 Jan 2018
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Introduced: 3 Jan 2018

CVE-2017-18017 Open this link in a new tab
CWE-119 Open this link in a new tab

How to fix?

Upgrade Centos:7 kernel-rt-debug to version 0:3.10.0-862.rt56.804.el7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug package and not the kernel-rt-debug package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before 4.11, and 4.9.x before 4.9.36, allows remote attackers to cause a denial of service (use-after-free and memory corruption) or possibly have unspecified other impact by leveraging the presence of xt_TCPMSS in an iptables action.

References

CVSS Scores

version 3.1
Expand this section

NVD

9.8 critical
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High