Use-after-free vulnerability in the sofree function in slirp/socket.c in QEMU (aka Quick Emulator) allows attackers to cause a denial of service (QEMU instance crash) by leveraging failure to properly clear ifq_so from pending packets.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
| Link | Tags |
|---|---|
| http://www.securityfocus.com/bid/100534 | third party advisory vdb entry |
| https://access.redhat.com/errata/RHSA-2018:0816 | third party advisory vendor advisory |
| http://www.openwall.com/lists/oss-security/2017/08/29/6 | patch mailing list third party advisory |
| http://www.debian.org/security/2017/dsa-3991 | third party advisory vendor advisory |
| https://access.redhat.com/errata/RHSA-2018:1104 | third party advisory vendor advisory |
| https://access.redhat.com/errata/RHSA-2018:1113 | third party advisory vendor advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=1486400 | patch third party advisory issue tracking |
| https://lists.gnu.org/archive/html/qemu-devel/2017-08/msg05201.html | patch mailing list third party advisory |