Vulnerability identifier: #VU32089
Vulnerability risk: Medium
CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID:
CWE-ID:
CWE-401
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
QEMU
Client/Desktop applications /
Virtualization software
Vendor: QEMU
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the v9fs_link function in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (memory consumption) via vectors involving a reference to the source fid object. A remote attacker can perform a denial of service attack.
Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versions
QEMU: 3.1.3
External links
https://git.qemu.org/?p=qemu.git;a=commit;h=4c1586787ff43c9acd18a56c12d720e3e6be9f7c
https://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html
https://www.openwall.com/lists/oss-security/2016/10/28/3
https://www.openwall.com/lists/oss-security/2016/10/30/9
https://www.securityfocus.com/bid/93965
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg02608.html
https://security.gentoo.org/glsa/201611-11
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.