SB2024122794 - Debian update for xen
Published: December 27, 2024
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 12 vulnerabilities.
1) Information disclosure (CVE-ID: CVE-2023-28746)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to information exposure through microarchitectural state after transient execution from some register files for some Intel Atom Processors. A local user can gain access to sensitive information.
2) Resource management error (CVE-ID: CVE-2023-46841)
CWE-ID: CWE-399 - Resource Management Errors
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:Green
The vulnerability allows a remote guest to perform a denial of service (DoS) attack.
The vulnerability exists due to incorrect implementation of the Shadow Stacks (CET-SS) feature. An unprivileged guest can cause a hypervisor crash, causing a Denial of Service (DoS) of the entire host.
3) Input validation error (CVE-ID: CVE-2023-46842)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of register values when invoking a hypercall. A malicious HVM or PVH guest can pass specially crafted input to the hypervisor and perform a denial of service (DoS) attack.
4) Race condition (CVE-ID: CVE-2024-2193)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a speculative race condition. A local user can exploit the race and gain unauthorized access to contents of arbitrary host memory, including memory assigned to other guests.
The vulnerability was dubbed GhostRace.
5) Processor optimization removal or modification of security-critical code (CVE-ID: CVE-2024-2201)
CWE-ID: CWE-1037 - Processor optimization removal or modification of security-critical code
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Green
The vulnerability allows a malicious guest to escalate privileges on the system.
The vulnerability exists due to native branch history injection on x86 systems. A malicious guest can infer the contents of arbitrary host memory, including memory assigned to other guests and compromise the affected system.
6) Type confusion (CVE-ID: CVE-2024-31142)
CWE-ID: CWE-843 - Type confusion
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a malicious guest to escalate privileges on the system.
The vulnerability exists due to a logical error caused by a branch type confusion when implementing fixes for the following vulnerabilities:
#VU65219 (CVE-2022-23816)
#VU65204 (CVE-2022-23825)
#VU65205 (CVE-2022-29900)
#VU79263 (CVE-2023-20569)
A malicious guest can gain access to sensitive information and escalate privileges on the system.
7) Improper locking (CVE-ID: CVE-2024-31143)
CWE-ID: CWE-667 - Improper Locking
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H/E:U/U:Green
The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.
The vulnerability exists due to double unlock in x86 guest IRQ handling. An optional feature of PCI MSI called "Multiple Message" allows a device to use multiple consecutive interrupt vectors. A malicious guest can crash the hypervisor.
8) Improper error handling (CVE-ID: CVE-2024-31145)
CWE-ID: CWE-388 - Error Handling
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a malicious guest to escalate privileges on the system.
The vulnerability exists due to improper error handling in x86 IOMMU identity mapping. A malicious guest can access memory regions related to other guests or the hypervisor.
9) Resource management error (CVE-ID: CVE-2024-31146)
CWE-ID: CWE-399 - Resource Management Errors
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a malicious guest to escalate privileges on the system.
The vulnerability exists due to improper management of shared resources when using PCI pass-through. A malicious guest can escalate privileges on the system.
10) Deadlock (CVE-ID: CVE-2024-45817)
CWE-ID: CWE-833 - Deadlock
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to perform a denial of service attack (DoS) on the target system.
The vulnerability exists due to a deadlock within the vlapic_error() function. A buggy or malicious HVM or PVH guest can deadlock Xen and perform a denial of service attack.
11) Improper locking (CVE-ID: CVE-2024-45818)
CWE-ID: CWE-667 - Improper Locking
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a malicious guest to perform a denial of service attack (DoS) on the target system.
The vulnerability exists due to improper locking in standard VGA implementation. A malicious guest can cause a deadlock and perform a denial of service attack against the entire host.
12) Memory leak (CVE-ID: CVE-2024-45819)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:U/U:Green
The vulnerability allows a malicious guest to gain access to sensitive information.
The vulnerability exists due data leak in libxl related to how PBH guests work with ACPI tables. A malicious guest can access sensitive information pertaining to the host, control domain, or other guests.
Remediation
Install update from vendor's website.