Qemu emulator <= 3.0.0 built with the NE2000 NIC emulation support is vulnerable to an integer overflow, which could lead to buffer overflow issue. It could occur when receiving packets over the network. A user inside guest could use this flaw to crash the Qemu process resulting in DoS.
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
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 |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10839 | issue tracking third party advisory |
| https://www.debian.org/security/2018/dsa-4338 | vendor advisory |
| https://usn.ubuntu.com/3826-1/ | patch vendor advisory |
| https://www.openwall.com/lists/oss-security/2018/10/08/1 | 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/2018-09/msg03273.html | mailing list exploit third party advisory |
| https://access.redhat.com/errata/RHSA-2019:2892 | vendor advisory |