Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | <= 2.7.1 |
| Debian | Debian Linux | 8.0 |
Related Weaknesses (CWE)
References
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=070c4b92b8cd5390889716677a0b92444
- http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.htmlMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/10/03/2Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/10/03/5Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/93273Third Party AdvisoryVDB Entry
- https://lists.debian.org/debian-lts-announce/2018/11/msg00038.htmlThird Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg05557.htmlMailing ListPatchVendor Advisory
- https://security.gentoo.org/glsa/201611-11Third Party Advisory
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=070c4b92b8cd5390889716677a0b92444
- http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.htmlMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/10/03/2Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/10/03/5Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/93273Third Party AdvisoryVDB Entry
- https://lists.debian.org/debian-lts-announce/2018/11/msg00038.htmlThird Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg05557.htmlMailing ListPatchVendor Advisory
FAQ
What is CVE-2016-7908?
CVE-2016-7908 is a vulnerability with a CVSS score of 4.4 (MEDIUM). 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...
How severe is CVE-2016-7908?
CVE-2016-7908 has been rated MEDIUM with a CVSS base score of 4.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-7908?
Check the references section above for vendor advisories and patch information. Affected products include: Qemu Qemu, Debian Debian Linux.