CVE-2018-1087
Description
kernel KVM before versions kernel 4.16, kernel 4.16-rc7, kernel 4.17-rc1, kernel 4.17-rc2 and kernel 4.17-rc3 is vulnerable to a flaw in the way the Linux kernel's KVM hypervisor handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first instruction after the stack switch is executed. An unprivileged KVM guest user could use this flaw to crash the guest or, potentially, escalate their privileges in the guest.
How to fix
- access.redhat.com/errata/RHSA-2018:1347
- access.redhat.com/errata/RHSA-2018:1348
- debian.org/security/2018/dsa-4196
- access.redhat.com/errata/RHSA-2018:1355
- access.redhat.com/errata/RHSA-2018:1345
- access.redhat.com/errata/RHSA-2018:1318
- access.redhat.com/errata/RHSA-2018:1524
- usn.ubuntu.com/3641-2/
- usn.ubuntu.com/3641-1/
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.16, 4.17 | — |
| canonical ubuntu_linux | 14.04, 16.04, 17.10 | — |
| debian debian_linux | 8.0, 9.0 | — |
| redhat enterprise_linux | 7.0 | — |
| redhat enterprise_linux_desktop | 7.0 | — |
| redhat enterprise_linux_server | 7.0 | — |
| redhat enterprise_linux_server_aus | 7.2, 7.3, 7.4 | — |
| redhat enterprise_linux_server_eus | 7.3, 7.4, 7.5 | — |
| redhat enterprise_linux_server_tus | 7.2, 7.3, 7.4 | — |
| redhat enterprise_linux_virtualization | 4.0 | — |
| redhat enterprise_linux_workstation | 7.0 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.