MEDIUM 6.5 Microsoft

CVE-2019-10638

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.

Microsoft Security Update 2019-Jul: 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.

Affected Products

References

Published: 2019-07-09 · Source: Microsoft · Feed updated: 2026-10-23
This medium severity vulnerability with a CVSS score of 6.5 was published on 2019-07-09 via Microsoft. Affected: azl3 hyperv-daemons 6.6.35.1-1 on Azure Linux 3.0, azl3 hyperv-daemons 6.6.92.2-1 on Azure Linux 3.0.
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