#VU13050 Race condition in QEMU - CVE-2017-15038


Vulnerability identifier: #VU13050

Vulnerability risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-15038

CWE-ID: CWE-362

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description

The vulnerability allows an adjacent attacker to obtain potentially sensitive information on the target system.

The weakness exists due to race condition in the v9fs_xattrwalk function in hw/9pfs/9p.c in QEMU (aka Quick Emulator). An adjacent attacker can obtain sensitive information from host heap memory via vectors related to reading extended attributes.

Mitigation
Install update from vendor's website.

Vulnerable software versions

QEMU: 2.8.0 - 2.10.2

External links
https://lists.gnu.org/archive/html/qemu-devel/2017-10/msg00729.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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


Latest bulletins with this vulnerability


Debian update for qemu
Fedora 27 update for qemu