CVE-2021-47309
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47309
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47309.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47309
- Related
- Published
- 2024-05-21T15:15:18Z
- Modified
- 2024-09-18T03:17:25.143587Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net: validate lwtstate->data before returning from skbtunnelinfo()
skbtunnelinfo() returns pointer of lwtstate->data as iptunnelinfo type without validation. lwtstate->data can have various types such as mplsiptunnelencap, etc and these are not compatible. So skbtunnelinfo() should validate before returning that pointer.
Splat looks like: BUG: KASAN: slab-out-of-bounds in vxlangetroute+0x418/0x4b0 [vxlan] Read of size 2 at addr ffff888106ec2698 by task ping/811
CPU: 1 PID: 811 Comm: ping Not tainted 5.13.0+ #1195 Call Trace: dumpstacklvl+0x56/0x7b printaddressdescription.constprop.8.cold.13+0x13/0x2ee ? vxlangetroute+0x418/0x4b0 [vxlan] ? vxlangetroute+0x418/0x4b0 [vxlan] kasanreport.cold.14+0x83/0xdf ? vxlangetroute+0x418/0x4b0 [vxlan] vxlangetroute+0x418/0x4b0 [vxlan] [ ... ] vxlanxmitone+0x148b/0x32b0 [vxlan] [ ... ] vxlanxmit+0x25c5/0x4780 [vxlan] [ ... ] devhardstartxmit+0x1ae/0x6e0 _devqueuexmit+0x1f39/0x31a0 [ ... ] neighxmit+0x2f9/0x940 mplsxmit+0x911/0x1600 [mplsiptunnel] lwtunnelxmit+0x18f/0x450 ipfinishoutput2+0x867/0x2040 [ ... ]
- References
-
- https://git.kernel.org/stable/c/2179d96ec702cc33ead02a9ce40ece599b8538c5
- https://git.kernel.org/stable/c/67a9c94317402b826fc3db32afc8f39336803d97
- https://git.kernel.org/stable/c/83bdcfbd968bcc91a0632b7b625e4a9b0cba5e0d
- https://git.kernel.org/stable/c/8aa13a86964cdec4fd969ef677c6614ff068641a
- https://git.kernel.org/stable/c/8bb1589c89e61e3b182dd546f1021928ebb5c2a6
- https://git.kernel.org/stable/c/a915379594f1e045421635c6316d8f3ffa018c58
- https://git.kernel.org/stable/c/b61d327cd3cc5ea591f3bf751dd11e034f388bb5
- https://git.kernel.org/stable/c/e7f3c9df40515a6c6b46f36c4c94cf48a043f887
- https://security-tracker.debian.org/tracker/CVE-2021-47309
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source