Detections
Analytics
Alpine: xen: security update to 4.9.2-r2
high Tenable Cloud Security Plugin ID 407908
Description
There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:- A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer's
Manual (SDM) was mishandled in the development of some or all operating-system kernels, resulting in
unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS, as demonstrated by (for
example) privilege escalation in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux kernel
crash. The MOV to SS and POP SS instructions inhibit interrupts (including NMIs), data breakpoints, and
single step trap exceptions until the instruction boundary following the next instruction (SDM Vol. 3A;
section 6.8.3). (The inhibited data breakpoints are those on memory accessed by the MOV to SS or POP to SS
instruction itself.) Note that debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF)
system flag (SDM Vol. 3A; section 2.3). If the instruction following the MOV to SS or POP to SS
instruction is an instruction like SYSCALL, SYSENTER, INT 3, etc. that transfers control to the operating
system at CPL < 3, the debug exception is delivered after the transfer to CPL < 3 is complete. OS kernels
may not expect this order of events and may therefore experience unexpected behavior when it occurs.
(CVE-2018-8897)
- An issue was discovered in Xen through 4.10.x allowing x86 HVM guest OS users to cause a denial of service
(host OS infinite loop) in situations where a QEMU device model attempts to make invalid transitions
between states of a request. (CVE-2018-10981)
- An issue was discovered in Xen through 4.10.x allowing x86 HVM guest OS users to cause a denial of service
(unexpectedly high interrupt number, array overrun, and hypervisor crash) or possibly gain hypervisor
privileges by setting up an HPET timer to deliver interrupts in IO-APIC mode, aka vHPET interrupt
injection. (CVE-2018-10982)
See Also
https://security.alpinelinux.org/vuln/CVE-2018-8897
Plugin Details
Severity: High
ID: 407908
Version: Revision 1.36
Type: Local
Published: 10/31/2023
Updated: 4/20/2026
Supported Sensors: Agentless Assessment
Risk Information
VPR
Risk Factor: Critical
Score: 9.4
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 6.3
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2018-8897
CVSS v3
Risk Factor: High
Base Score: 8.8
Temporal Score: 8.4
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C
CVSS Score Source: CVE-2018-10982
Vulnerability Information
Exploit Available: true
Exploit Ease: Exploits are available
Vulnerability Publication Date: 4/18/2018
Exploitable With
Metasploit (Microsoft Windows POP/MOV SS Local Privilege Elevation Vulnerability)
Reference Information
CVE: CVE-2018-10981, CVE-2018-10982, CVE-2018-8897
IAVA: 2018-A-0144-S
IAVB: 2018-B-0061-S