Covert Timing Channel Affecting kernel-rt-trace-devel package, versions <0:3.10.0-1062.1.1.rt56.1024.el7


Severity

high

    Threat Intelligence

    Exploit Maturity
    Mature
    EPSS
    0.08% (36th percentile)

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  • Snyk ID SNYK-CENTOS7-KERNELRTTRACEDEVEL-2146351
  • published 26 Jul 2021
  • disclosed 6 Aug 2019

How to fix?

Upgrade Centos:7 kernel-rt-trace-devel 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-trace-devel package and not the kernel-rt-trace-devel package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

An information disclosure vulnerability exists when certain central processing units (CPU) speculatively access memory. An attacker who successfully exploited the vulnerability could read privileged data across trust boundaries. To exploit this vulnerability, an attacker would have to log on to an affected system and run a specially crafted application. The vulnerability would not allow an attacker to elevate user rights directly, but it could be used to obtain information that could be used to try to compromise the affected system further. On January 3, 2018, Microsoft released an advisory and security updates related to a newly-discovered class of hardware vulnerabilities (known as Spectre) involving speculative execution side channels that affect AMD, ARM, and Intel CPUs to varying degrees. This vulnerability, released on August 6, 2019, is a variant of the Spectre Variant 1 speculative execution side channel vulnerability and has been assigned CVE-2019-1125. Microsoft released a security update on July 9, 2019 that addresses the vulnerability through a software change that mitigates how the CPU speculatively accesses memory. Note that this vulnerability does not require a microcode update from your device OEM.

CVSS Scores

version 3.1
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Snyk

5.9 high
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Changed
  • Confidentiality (C)
    High
  • Integrity (I)
    None
  • Availability (A)
    None
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NVD

5.6 medium
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SUSE

5.5 medium
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Red Hat

5.9 medium