#VU31803 Out-of-bounds write in QEMU - CVE-2020-13754
Vulnerability identifier: #VU31803
Vulnerability risk: Medium
CVSSv4.0: 6.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-13754
CWE-ID:
CWE-787
Exploitation vector: Local network
Exploit availability: No
Vulnerable software:
QEMU
Client/Desktop applications /
Virtualization software
Vendor: QEMU
Description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input in hw/pci/msix.c. A local user on the guest operating system can send specially crafted address in an msi-x mmio operation, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code.
Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versions
QEMU: 4.1.0 - 5.0.0
External links
https://www.openwall.com/lists/oss-security/2020/06/01/6
https://www.openwall.com/lists/oss-security/2020/06/15/8
https://lists.gnu.org/archive/html/qemu-devel/2020-06/msg00004.html
https://security.netapp.com/advisory/ntap-20200608-0007/
https://www.debian.org/security/2020/dsa-4728
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
