CVSS 9.8 · Critical EPSS 0,26%
Kerentanan Access of Resource Using Incompatible Type ('Type Confusion') pada linux kernel. Skor CVSS 3.1 9.8 (Critical) menurut CNA.
In the Linux kernel, the following vulnerability has been resolved: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() Sashiko AI-review observed: In ip6_err_gen_icmpv6_unreach(), the skb is an outer IPv4 ICMP error packet where its cb contains an IPv4 inet_skb_parm. When skb is cloned into skb2 and passed to icmp6_send(), it uses IP6CB(skb2). IP6CB interprets the IPv4 inet_skb_parm as an inet6_skb_parm. The cipso offset in inet_skb_parm.opt directly overlaps with dsthao in inet6_skb_parm at offset 18. If an attacker sends a forged ICMPv4 error with a CIPSO IP option, dsthao would be a non-zero offset. Inside icmp6_send(), mip6_addr_swap() is called and uses ipv6_find_tlv(skb, opt->dsthao, IPV6_TLV_HAO). This would scan the inner, attacker-controlled IPv6 packet starting at that offset, potentially returning a fake TLV without checking if the remaining packet length can hold the full 18-byte struct ipv6_destopt_hao. Could mip6_addr_swap() then perform a 16-byte swap that extends past the end of the packet data into skb_shared_info? Should the cb array also be cleared in ip6_err_gen_icmpv6_unreach() and ip6ip6_err() to prevent this? This patch implements the first suggestion. I am not sure if ip6ip6_err() needs to be changed. A separate patch would be better anyway.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi sesudah 3.13 hingga sebelum 5.10.253 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.15.203 |
| linux | linux kernel | Versi 5.16 hingga sebelum 6.1.168 |
| linux | linux kernel | Versi 6.2 hingga sebelum 6.6.134 |
| linux | linux kernel | Versi 6.7 hingga sebelum 6.12.81 |
| linux | linux kernel | Versi 6.13 hingga sebelum 6.18.22 |
| linux | linux kernel | Versi 6.19 hingga sebelum 6.19.12 |
| linux | linux kernel | Versi 3.13 |
| linux | linux kernel | Versi 3.13 rc3 |
| linux | linux kernel | Versi 3.13 rc4 |
| linux | linux kernel | Versi 3.13 rc5 |
| linux | linux kernel | Versi 3.13 rc6 |
| linux | linux kernel | Versi 3.13 rc7 |
| linux | linux kernel | Versi 3.13 rc8 |
| linux | linux kernel | Versi 7.0 rc1 |
| linux | linux kernel | Versi 7.0 rc2 |
| linux | linux kernel | Versi 7.0 rc3 |
| linux | linux kernel | Versi 7.0 rc4 |
| linux | linux kernel | Versi 7.0 rc5 |
| linux | linux kernel | Versi 7.0 rc6 |