Vulnerability Details : CVE-2016-7908
The mcf_fec_do_tx function in hw/net/mcf_fec.c in QEMU (aka Quick Emulator) does not properly limit the buffer descriptor count when transmitting packets, which allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via vectors involving a buffer descriptor with a length of 0 and crafted values in bd.flags.
Vulnerability category: Denial of service
Exploit prediction scoring system (EPSS) score for CVE-2016-7908
Probability of exploitation activity in the next 30 days: 0.06%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 25 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2016-7908
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
2.1
|
LOW | AV:L/AC:L/Au:N/C:N/I:N/A:P |
3.9
|
2.9
|
NIST |
|
4.4
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H |
0.8
|
3.6
|
NIST |
CWE ids for CVE-2016-7908
-
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.Assigned by: nvd@nist.gov (Primary)
References for CVE-2016-7908
-
https://security.gentoo.org/glsa/201611-11
QEMU: Multiple vulnerabilities (GLSA 201611-11) — Gentoo securityThird Party Advisory
-
http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=070c4b92b8cd5390889716677a0b92444d6e087a
QEMU · GitLab
-
https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg05557.html
Re: [Qemu-devel] [PATCH v2] net: mcf: limit buffer descriptor countMailing List;Patch;Vendor Advisory
-
http://www.securityfocus.com/bid/93273
QEMU 'hw/net/mcf_fec.c' Denial of Service VulnerabilityThird Party Advisory;VDB Entry
-
http://www.openwall.com/lists/oss-security/2016/10/03/2
oss-security - CVE request Qemu: net: Infinite loop in mcf_fec_do_txMailing List;Third Party Advisory
-
http://www.openwall.com/lists/oss-security/2016/10/03/5
oss-security - Re: CVE request Qemu: net: Infinite loop in mcf_fec_do_txMailing List;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
[SECURITY] [DLA 1599-1] qemu security updateThird Party Advisory
-
http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html
openSUSE-SU-2016:3237-1: moderate: Security update for qemuMailing List;Third Party Advisory
Products affected by CVE-2016-7908
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*