CVE-2017-15118 Information

Description

A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allowing a client to request an export name of size up to 4096 bytes which in fact should be limited to 256 bytes causing an out-of-bounds stack write in the qemu process. If NBD server requires TLS the attacker cannot trigger the buffer overflow without first successfully negotiating TLS.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

http://www.openwall.com/lists/oss-security/2017/11/28/8 http://www.securityfocus.com/bid/101975 https://access.redhat.com/errata/RHSA-2018:1104 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-15118 https://lists.gnu.org/archive/html/qemu-devel/2017-11/msg05045.html https://usn.ubuntu.com/3575-1/ https://www.exploit-db.com/exploits/43194/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8