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CentOS Linux: CVE-2019-10638: Important: kernel-rt security and bug fix update (Multiple Advisories)

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CentOS Linux: CVE-2019-10638: Important: kernel-rt security and bug fix update (Multiple Advisories)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:P/I:N/A:N)
Published
07/05/2019
Created
11/07/2019
Added
11/06/2019
Modified
05/25/2023

Description

In the Linux kernel before 5.1.7, a device can be tracked by an attacker using the IP ID values the kernel produces for connection-less protocols (e.g., UDP and ICMP). When such traffic is sent to multiple destination IP addresses, it is possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). An attack may be conducted by hosting a crafted web page that uses WebRTC or gQUIC to force UDP traffic to attacker-controlled IP addresses.

Solution(s)

  • centos-upgrade-kernel
  • centos-upgrade-kernel-rt

References

  • 109092
  • DSA-4495
  • DSA-4497
  • CVE-2019-10638
  • RHSA-2019:3309
  • RHSA-2019:3517

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