#VU17907 Memory leak in Xen - CVE-2019-17340

Vulnerability identifier: #VU17907

Vulnerability risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-17340

CWE-ID: CWE-401

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description
The vulnerability allows a local user to perform DoS attack or escalate privileges on the target system.

The vulnerability exists due memory leak when processing grant table transfer requests. A local user from one domain can gain access to data stored in memory that belong to another domain or consume all available memory resources on the system.

Successful exploitation of the vulnerability may allow an attacker to perform a denial of service attack or, in certain cases, to allow privilege escalation.

Mitigation

Vulnerable software versions

Xen: 4.7.0 - 4.11.1

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External links
https://xenbits.xen.org/xsa/advisory-284.html

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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.