Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: Fix icmp host relookup triggering ip_rt_bug arp link failure may trigger ip_rt_bug while xfrm enabled, call trace is: WARNING: CPU: 0 PID: 0 at net/ipv4/route.c:1241 ip_rt_bug+0x14/0x20 Modules linked in: CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.0-rc6-00077-g2e1b3cc9d7f7 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 RIP: 0010:ip_rt_bug+0x14/0x20 Call Trace: <IRQ> ip_send_skb+0x14/0x40 __icmp_send+0x42d/0x6a0 ipv4_link_failure+0xe2/0x1d0 arp_error_report+0x3c/0x50 neigh_invalidate+0x8d/0x100 neigh_timer_handler+0x2e1/0x330 call_timer_fn+0x21/0x120 __run_timer_base.part.0+0x1c9/0x270 run_timer_softirq+0x4c/0x80 handle_softirqs+0xac/0x280 irq_exit_rcu+0x62/0x80 sysvec_apic_timer_interrupt+0x77/0x90 The script below reproduces this scenario: ip xfrm policy add src 0.0.0.0/0 dst 0.0.0.0/0 \ dir out priority 0 ptype main flag localok icmp ip l a veth1 type veth ip a a 192.168.141.111/24 dev veth0 ip l s veth0 up ping 192.168.141.155 -c 1 icmp_route_lookup() create input routes for locally generated packets while xfrm relookup ICMP traffic.Then it will set input route (dst->out = ip_rt_bug) to skb for DESTUNREACH. For ICMP err triggered by locally generated packets, dst->dev of output route is loopback. Generally, xfrm relookup verification is not required on loopback interfaces (net.ipv4.conf.lo.disable_xfrm = 1). Skip icmp relookup for locally generated packets to fix it.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 8b7817f3a959ed99d7443afc12f78a7e1fcc2063 before d50981aaaefc3b04490fbc8274d37881a2b1b112; affected 8b7817f3a959ed99d7443afc12f78a7e1fcc2063 before da54b3039d436227deebbc202cefea63bd318a38; affected 8b7817f3a959ed99d7443afc12f78a7e1fcc2063 before 9545011e7b2a8fc0cbd6e387a09f12cd41d7d82f; affected 8b7817f3a959ed99d7443afc12f78a7e1fcc2063 before c44daa7e3c73229f7ac74985acb8c7fb909c4e0a |
| Linux / Linux | affected 2.6.25; unaffected 0 before 2.6.25; unaffected 6.1.175 through 6.1.*; unaffected 6.6.140 through 6.6.*; unaffected 6.12.5 through 6.12.*; unaffected 6.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d50981aaaefc3b04490fbc8274d37881a2b1b112
- https://git.kernel.org/stable/c/da54b3039d436227deebbc202cefea63bd318a38
- https://git.kernel.org/stable/c/9545011e7b2a8fc0cbd6e387a09f12cd41d7d82f
- https://git.kernel.org/stable/c/c44daa7e3c73229f7ac74985acb8c7fb909c4e0a
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.