QID 670962

Date Published: 2021-11-24

QID 670962: EulerOS Security Update for spice-vdagent (EulerOS-SA-2021-2617)

Spice agent for Linux guests offering the following features: Features: * Client mouse mode (no need to grab Spice agent for Linux guests offering the following features: Features: * Client mouse mode (no need to grab mouse by client, no mouse lag) this is handled by the daemon by feeding mouse events into the kernel via uinput. This will only work if the active X-session is running a spice-vdagent process so that its resolution can be determined. * Automatic adjustment of the X-session resolution to the client resolution * Support of copy and paste (text and images) between the active X-session and the client Security Fix(es): A flaw was found in the way the spice-vdagentd daemon handled file transfers from the host system to the virtual machine. Any unprivileged local guest user with access to the UNIX domain socket path `/run/spice-vdagentd/spice-vdagent-sock` could use this flaw to perform a memory denial of service for spice-vdagentd or even other processes in the VM system. The highest threat from this vulnerability is to system availability. This flaw affects spice-vdagent versions 0.20 and previous versions.(CVE-2020-25650) A flaw was found in the SPICE file transfer protocol. File data from the host system can end up in full or in parts in the client connection of an illegitimate local user in the VM system. Active file transfers from other users could also be interrupted, resulting in a denial of service. The highest threat from this vulnerability is to data confidentiality as well as system availability. This flaw affects spice-vdagent versions 0.20 and prior.(CVE-2020-25651) A flaw was found in the spice-vdagentd daemon, where it did not properly handle client connections that can be established via the UNIX domain socket in `/run/spice-vdagentd/spice-vdagent-sock`. Any unprivileged local guest user could use this flaw to prevent legitimate agents from connecting to the spice-vdagentd daemon, resulting in a denial of service. The highest threat from this vulnerability is to system availability. This flaw affects spice-vdagent versions 0.20 and prior.(CVE-2020-25652)

An arbitrary attacker may exploit this vulnerability to compromise the system.

CVSS V3 rated as High - 6.4 severity.

CVSS V2 rated as Medium - 5.4 severity.

Solution

The Vendor has released a security update to fix the vulnerability. For more information please visit EulerOS-SA-2021-2617 for updates and patch information

Vendor References

EulerOS-SA-2021-2617 - developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2021-2617

CVEs related to QID 670962

CVE-2020-25653 | CVE-2020-25652 | CVE-2020-25651 | CVE-2020-25650 |

Software Advisories

Advisory ID	Software	Component	Link
EulerOS-SA-2021-2617	EulerOS V2.0SP3		developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2021-2617

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