#VU32087 Buffer overflow in QEMU - CVE-2016-9103

Vulnerability identifier: #VU32087

Vulnerability risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-9103

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description

The vulnerability allows a local privileged user to gain access to sensitive information.

The v9fs_xattrcreate function in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local guest OS administrators to obtain sensitive host heap memory information by reading xattribute values before writing to them.

Mitigation
Install update from vendor's website.

Vulnerable software versions

QEMU: 3.1.3

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External links
https://git.qemu.org/?p=qemu.git;a=commit;h=eb687602853b4ae656e9236ee4222609f3a6887d
https://www.openwall.com/lists/oss-security/2016/10/28/1
https://www.openwall.com/lists/oss-security/2016/10/30/7
https://www.securityfocus.com/bid/93955
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg01790.html
https://security.gentoo.org/glsa/201611-11

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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.