Denial of service in QEMU - CVE-2017-7539

Vulnerability identifier: #VU8113

CSH Severity: Low

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2017-7539

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause DoS condition on a targeted system.

The weakness exists due to an assertion failure when handling malicious input. A remote attacker can submit a specially crafted data during initial connection negotiation and cause the qemu-nbd server to stop functioning.

Successful exploitation of the vulnerability results in denial of service.

QEMU

Red Hat Virtualization
Red Hat OpenStack
qemu-kvm-rhev (Red Hat package)

Install update from vendor's website.
https://git.qemu.org/?p=qemu.git;a=patch;h=2b0bbc4f8809c972bad134bc1a2570dbb01dea0b

qemu-kvm-rhev (Red Hat package) - update to 2.9.0-16.el7_4.11

• https://git.qemu.org/?p=qemu.git;a=commit;h=ff82911cd3f69f028f2537825c9720ff78bc3f19

• Multiple vulnerabilities in QEMU
• Red Hat update for QEMU
• Red Hat update for qemu-kvm-rhev
• Red Hat update for qemu-kvm-rhev
• Red Hat update for qemu-kvm-rhev
• Red Hat update for qemu-kvm-rhev
• Red Hat update for qemu-kvm-rhev
• Red Hat Enterprise Linux OpenStack Platform 6 update for qemu-kvm-rhev