Note:
This project will be discontinued after December 13, 2021. [more]
2018-03-02
The netfilter subsystem in the Linux kernel through 4.15.7 mishandles the case of a rule blob that contains a jump but lacks a user-defined chain, which allows local users to cause a denial of service (NULL pointer dereference) by leveraging the CAP_NET_RAW or CAP_NET_ADMIN capability, related to arpt_do_table in net/ipv4/netfilter/arp_tables.c, ipt_do_table in net/ipv4/netfilter/ip_tables.c, and ip6t_do_table in net/ipv6/netfilter/ip6_tables.c.
| Products | Linux_kernel |
| Type | NULL Pointer Dereference (CWE-476) |
| First patch |
https://github.com/torvalds/linux/commit/57ebd808a97d7c5b1e1afb937c2db22beba3c1f8 |
| Patches | http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=57ebd808a97d7c5b1e1afb937c2db22beba3c1f8 |
| Relevant file/s |
• ./net/ipv4/netfilter/arp_tables.c (modified, +4)
• ./net/ipv4/netfilter/ip_tables.c (modified, +6, -1) • ./net/ipv6/netfilter/ip6_tables.c (modified, +4) |
| Links |
• http://lists.openwall.net/netdev/2018/01/27/46
• http://www.securitytracker.com/id/1040446 • https://usn.ubuntu.com/3656-1/ • https://access.redhat.com/errata/RHSA-2018:2948 • https://usn.ubuntu.com/3654-1/ |
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