| Summary: | Kernel : vhost-net: use-after-free in vhost_net_flush (CVE-2013-4127) | ||
|---|---|---|---|
| Product: | Gentoo Security | Reporter: | Agostino Sarubbo <ago> |
| Component: | Kernel | Assignee: | Gentoo Kernel Security <security-kernel> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | kernel |
| Priority: | Normal | ||
| Version: | unspecified | ||
| Hardware: | All | ||
| OS: | Linux | ||
| URL: | http://www.openwall.com/lists/oss-security/2013/07/15/6 | ||
| Whiteboard: | |||
| Package list: | Runtime testing required: | --- | |
------------------------------------------------------------------------ r2443 | tomwij | 2013-07-20 19:48:05 +0200 (Sat, 20 Jul 2013) | 1 line Commit security fixes for CVE-2013-4125 (fixes bug #477464), CVE-2013-4127 (fixes bug #477466) and CVE-2013-3129 (fixes bug #477468) to branches 3.8, 3.9, 3.10 and 3.11 were they are present and apply. ------------------------------------------------------------------------ CVE-2013-4127 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-4127): Use-after-free vulnerability in the vhost_net_set_backend function in drivers/vhost/net.c in the Linux kernel through 3.10.3 allows local users to cause a denial of service (OOPS and system crash) via vectors involving powering on a virtual machine. Fix in 3.11 onward |
From ${URL} : vhost_net_ubuf_put_and_wait has a confusing name: it will actually also free it's argument. vhost_net_flush tries to use the argument after passing it to vhost_net_ubuf_put_and_wait, this results in use after free. Upstream fix: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dd7633ecd553a5e304d349aa6f8eb8a0417098c5 Introduced by: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1280c27f8e29acf4af2da914e80ec27c3dbd5c01 Introduced in upstream version: v3.8-rc1 References: https://bugzilla.redhat.com/show_bug.cgi?id=984722 https://bugzilla.redhat.com/show_bug.cgi?id=980643 http://pkgs.fedoraproject.org/cgit/kernel.git/commit/?h=f19&id=da4ebd83da1869778909f394f6ebd50850ef5fec