Heap-based Buffer Overflow Affecting kernel-rt-kvm package, versions <0:3.10.0-1062.1.1.rt56.1024.el7


Severity

high

    Threat Intelligence

    EPSS
    0.68% (81st percentile)

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  • Snyk ID SNYK-CENTOS7-KERNELRTKVM-2145501
  • published 26 Jul 2021
  • disclosed 19 Feb 2019

How to fix?

Upgrade Centos:7 kernel-rt-kvm to version 0:3.10.0-1062.1.1.rt56.1024.el7 or higher.

NVD Description

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

The Broadcom brcmfmac WiFi driver prior to commit 1b5e2423164b3670e8bc9174e4762d297990deff is vulnerable to a heap buffer overflow. If the Wake-up on Wireless LAN functionality is configured, a malicious event frame can be constructed to trigger an heap buffer overflow in the brcmf_wowl_nd_results function. This vulnerability can be exploited with compromised chipsets to compromise the host, or when used in combination with CVE-2019-9503, can be used remotely. In the worst case scenario, by sending specially-crafted WiFi packets, a remote, unauthenticated attacker may be able to execute arbitrary code on a vulnerable system. More typically, this vulnerability will result in denial-of-service conditions.

CVSS Scores

version 3.1
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Snyk

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

8.3 high
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SUSE

5 medium
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Red Hat

6.5 medium