** Description changed:
- Currently we do not validate the vector length before calling
- get_user_pages_fast(), host stack could be easily overflowed by
- malicious guest driver who gives us a descriptors with length greater
- than MAX_SKB_FRAGS. A privileged guest user could use this flaw to
- induce stack overflow on the host with attacker non-controlled data
- (some bits can be guessed, as it will be pointers to kernel memory) but
- with attacker controlled length.
+ Buffer overflow in the macvtap device driver in the Linux kernel before
+ 3.4.5, when running in certain configurations, allows privileged KVM guest
+ users to cause a denial of service (crash) via a long descriptor with a
+ long vector length.
- Break-Fix: 97bc3633bec7ed0fdfbda6b9cf86c51e4f58f8e2 -
3afc9621f15701c557e60f61eba9242bac2771dd
- Break-Fix: 97bc3633bec7ed0fdfbda6b9cf86c51e4f58f8e2 -
4ef67ebedffa44ed9939b34708ac2fee06d2f65f
- Break-Fix: 97bc3633bec7ed0fdfbda6b9cf86c51e4f58f8e2 -
02ce04bb3d28c3333231f43bca677228dbc686fe
- Break-Fix: 97bc3633bec7ed0fdfbda6b9cf86c51e4f58f8e2 -
01d6657b388438def19c8baaea28e742b6ed32ec
- Break-Fix: 97bc3633bec7ed0fdfbda6b9cf86c51e4f58f8e2 -
b92946e2919134ebe2a4083e4302236295ea2a73
+ Break-Fix: 97bc3633bec7ed0fdfbda6b9cf86c51e4f58f8e2
3afc9621f15701c557e60f61eba9242bac2771dd
+ Break-Fix: 97bc3633bec7ed0fdfbda6b9cf86c51e4f58f8e2
4ef67ebedffa44ed9939b34708ac2fee06d2f65f
+ Break-Fix: 97bc3633bec7ed0fdfbda6b9cf86c51e4f58f8e2
02ce04bb3d28c3333231f43bca677228dbc686fe
+ Break-Fix: 97bc3633bec7ed0fdfbda6b9cf86c51e4f58f8e2
01d6657b388438def19c8baaea28e742b6ed32ec
+ Break-Fix: 97bc3633bec7ed0fdfbda6b9cf86c51e4f58f8e2
b92946e2919134ebe2a4083e4302236295ea2a73
** Changed in: linux (Ubuntu Lucid)
Status: In Progress => Invalid
** Changed in: linux-ec2 (Ubuntu Lucid)
Status: New => Invalid
** Changed in: linux-fsl-imx51 (Ubuntu Lucid)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/987566
Title:
CVE-2012-2119
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