Multiple integer overflows in the (1) v9fs_xattr_read and (2) v9fs_xattr_write functions in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allow local guest OS administrators to cause a denial of service (QEMU process crash) via a crafted offset, which triggers an out-of-bounds access.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| http://www.securityfocus.com/bid/93956 | vdb entry third party advisory |
| https://security.gentoo.org/glsa/201611-11 | third party advisory vendor advisory |
| http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html | mailing list third party advisory vendor advisory |
| http://www.openwall.com/lists/oss-security/2016/10/30/8 | third party advisory mailing list |
| http://www.openwall.com/lists/oss-security/2016/10/28/2 | third party advisory mailing list |
| https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html | third party advisory mailing list |
| https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg02942.html | mailing list third party advisory patch |