Debian update for xen



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-3665
CWE-ID CWE-200
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Debian Linux
Operating systems & Components / Operating system

Vendor Debian

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Side-channel attack

EUVDB-ID: #VU13337

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-3665

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a local attacker to obtain potentially sensitive information.

The vulnerability exists due to utilizing the Lazy FP state restore technique for floating point state when context switching between application processes. A local attacker can conduct cache side-channel attacks and determine register values of other processes.

Note: This vulnerability is known as LazyFP.

Mitigation

Update the affected package to version: 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u8

Vulnerable software versions

Debian Linux: All versions

CPE2.3 External links

https://www.debian.org/security/2018/dsa-4232


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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