Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.1.7 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.html
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.html
- http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackwar
- http://www.securityfocus.com/bid/109092Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3309
- https://access.redhat.com/errata/RHSA-2019:3517
- https://arxiv.org/pdf/1906.10478.pdfThird Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.8Mailing ListRelease NotesVendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.7Mailing ListRelease NotesVendor Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=355b9Mailing ListPatchVendor Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=df453Mailing ListPatchVendor Advisory
- https://github.com/torvalds/linux/commit/355b98553789b646ed97ad801a619ff898471b9PatchThird Party Advisory
- https://github.com/torvalds/linux/commit/55f0fc7a02de8f12757f4937143d8d5091b2e40PatchThird Party Advisory
- https://github.com/torvalds/linux/commit/df453700e8d81b1bdafdf684365ee2b9431fb70PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/08/msg00016.html
FAQ
What is CVE-2019-10638?
CVE-2019-10638 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 mul...
How severe is CVE-2019-10638?
CVE-2019-10638 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-10638?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.