Vulnerability Description
An issue was discovered in xenvif_set_hash_mapping in drivers/net/xen-netback/hash.c in the Linux kernel through 4.18.1, as used in Xen through 4.11.x and other products. The Linux netback driver allows frontends to control mapping of requests to request queues. When processing a request to set or change this mapping, some input validation (e.g., for an integer overflow) was missing or flawed, leading to OOB access in hash handling. A malicious or buggy frontend may cause the (usually privileged) backend to make out of bounds memory accesses, potentially resulting in one or more of privilege escalation, Denial of Service (DoS), or information leaks.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xen | Xen | <= 4.11.0 |
| Linux | Linux Kernel | >= 4.7, < 4.9.133 |
| Canonical | Ubuntu Linux | 14.04 |
Related Weaknesses (CWE)
References
- http://xenbits.xen.org/xsa/advisory-270.htmlVendor Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1607Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00017.htmlMailing ListThird Party Advisory
- https://usn.ubuntu.com/3819-1/Third Party Advisory
- https://usn.ubuntu.com/3820-1/Third Party Advisory
- https://usn.ubuntu.com/3820-2/Third Party Advisory
- https://usn.ubuntu.com/3820-3/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4313Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-270.htmlVendor Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1607Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00017.htmlMailing ListThird Party Advisory
- https://usn.ubuntu.com/3819-1/Third Party Advisory
- https://usn.ubuntu.com/3820-1/Third Party Advisory
- https://usn.ubuntu.com/3820-2/Third Party Advisory
- https://usn.ubuntu.com/3820-3/Third Party Advisory
FAQ
What is CVE-2018-15471?
CVE-2018-15471 is a vulnerability with a CVSS score of 7.8 (HIGH). An issue was discovered in xenvif_set_hash_mapping in drivers/net/xen-netback/hash.c in the Linux kernel through 4.18.1, as used in Xen through 4.11.x and other products. The Linux netback driver allo...
How severe is CVE-2018-15471?
CVE-2018-15471 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-15471?
Check the references section above for vendor advisories and patch information. Affected products include: Xen Xen, Linux Linux Kernel, Canonical Ubuntu Linux.