Description · from the CVE record
In the Linux kernel, the following vulnerability has been resolved:
netfilter: ip6tables: mark malformed IPv6 extension headers for hotdrop
The ah, hbh and rt matches check that the fixed extension header is
present, then use the header length field to derive the advertised
extension header length for matching.
For the ah match, add the missing advertised-length check. For hbh
and rt, update the existing advertised-length checks. In all three
cases, set hotdrop to true before returning false when the advertised
extension header length exceeds the available skb data.
Returning false treats the packet as a rule mismatch. Set hotdrop to
true and drop malformed packets so they cannot bypass rules intended
to drop packets with these IPv6 extension headers.
Affected
ProductAffectedFixed inSource
Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < f16d856b6af5fd0e7cb0b0212f70825b599ef72ef16d856b6af5fd0e7cb0b0212f70825b599ef72eCNA
Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < fc416870100cf16d5b9495199355a679c3a02d48fc416870100cf16d5b9495199355a679c3a02d48CNA
Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < f775fcf384b06f35b612f78fa5601fee99eb6513f775fcf384b06f35b612f78fa5601fee99eb6513CNA
Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 2fd89a50a9783eed8ed23866b11c8b3d8779a7a82fd89a50a9783eed8ed23866b11c8b3d8779a7a8CNA
Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 3578b6d92a5b1e603ae6e8c8f5538a709f03aba43578b6d92a5b1e603ae6e8c8f5538a709f03aba4CNA
Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 3d441be2b1c5e98167302fa1c7b61960a067b1123d441be2b1c5e98167302fa1c7b61960a067b112CNA
Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < d5e39e5eb6b30bc4a3bb7aba54c293cf36a806c7d5e39e5eb6b30bc4a3bb7aba54c293cf36a806c7CNA
Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 43ccc20b5a733226417832cf16ef45322e59499043ccc20b5a733226417832cf16ef45322e594990CNA
Linux2.6.12–CNA
by Kastro