CVE-2024-40957
seg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
seg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors
input_action_end_dx4() and input_action_end_dx6() are called NF_HOOK() for
PREROUTING hook, in PREROUTING hook, we should passing a valid indev,
and a NULL outdev to NF_HOOK(), otherwise may trigger a NULL pointer
dereference, as below:
[74830.647293] BUG: kernel NULL pointer dereference, address: 0000000000000090
[74830.655633] #PF: supervisor read access in kernel mode
[74830.657888] #PF: error_code(0x0000) - not-present page
[74830.659500] PGD 0 P4D 0
[74830.660450] Oops: 0000 [#1] PREEMPT SMP PTI
...
[74830.664953] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011
[74830.666569] RIP: 0010:rpfilter_mt+0x44/0x15e [ipt_rpfilter]
...
[74830.689725] Call Trace:
[74830.690402] <IRQ>
[74830.690953] ? show_trace_log_lvl+0x1c4/0x2df
[74830.692020] ? show_trace_log_lvl+0x1c4/0x2df
[74830.693095] ? ipt_do_table+0x286/0x710 [ip_tables]
[74830.694275] ? __die_body.cold+0x8/0xd
[74830.695205] ? page_fault_oops+0xac/0x140
[74830.696244] ? exc_page_fault+0x62/0x150
[74830.697225] ? asm_exc_page_fault+0x22/0x30
[74830.698344] ? rpfilter_mt+0x44/0x15e [ipt_rpfilter]
[74830.699540] ipt_do_table+0x286/0x710 [ip_tables]
[74830.700758] ? ip6_route_input+0x19d/0x240
[74830.701752] nf_hook_slow+0x3f/0xb0
[74830.702678] input_action_end_dx4+0x19b/0x1e0
[74830.703735] ? input_action_end_t+0xe0/0xe0
[74830.704734] seg6_local_input_core+0x2d/0x60
[74830.705782] lwtunnel_input+0x5b/0xb0
[74830.706690] __netif_receive_skb_one_core+0x63/0xa0
[74830.707825] process_backlog+0x99/0x140
[74830.709538] __napi_poll+0x2c/0x160
[74830.710673] net_rx_action+0x296/0x350
[74830.711860] __do_softirq+0xcb/0x2ac
[74830.713049] do_softirq+0x63/0x90
input_action_end_dx4() passing a NULL indev to NF_HOOK(), and finally
trigger a NULL dereference in rpfilter_mt()->rpfilter_is_loopback():
static bool
rpfilter_is_loopback(const struct sk_buff *skb,
const struct net_device *in)
{
// in is NULL
return skb->pkt_type == PACKET_LOOPBACK ||
in->flags & IFF_LOOPBACK;
}
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-07-12 CVE Reserved
- 2024-07-12 CVE Published
- 2024-08-29 EPSS Updated
- 2024-12-19 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-476: NULL Pointer Dereference
CAPEC
References (8)
URL | Tag | Source |
---|---|---|
https://git.kernel.org/stable/c/7a3f5b0de3647c854e34269c3332d7a1e902901a | Vuln. Introduced |
URL | Date | SRC |
---|
URL | Date | SRC |
---|---|---|
https://access.redhat.com/security/cve/CVE-2024-40957 | 2024-08-28 | |
https://bugzilla.redhat.com/show_bug.cgi?id=2297541 | 2024-08-28 |
Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.15 < 5.15.162 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 5.15.162" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.15 < 6.1.96 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 6.1.96" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.15 < 6.6.36 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 6.6.36" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.15 < 6.9.7 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 6.9.7" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.15 < 6.10 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 6.10" | en |
Affected
|