The slirp_smb function in net/slirp.c in QEMU 2.3.0 and earlier creates temporary files with predictable names, which allows local users to cause a denial of service (instantiation failure) by creating /tmp/qemu-smb.- files before the program.

References

• https://nvd.nist.gov/vuln/detail/CVE-2015-4037
• https://bugzilla.redhat.com/show_bug.cgi?id=1222892
• http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160058.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160414.html
• http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00027.html
• http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00015.html
• http://lists.opensuse.org/opensuse-updates/2015-11/msg00063.html
• http://www.debian.org/security/2015/dsa-3284
• http://www.debian.org/security/2015/dsa-3285
• http://www.openwall.com/lists/oss-security/2015/05/13/7
• http://www.openwall.com/lists/oss-security/2015/05/16/5
• http://www.openwall.com/lists/oss-security/2015/05/23/4
• http://www.securityfocus.com/bid/74809
• http://www.securitytracker.com/id/1032547
• http://www.ubuntu.com/usn/USN-2630-1