CVE-2024-26591
bpf: Fix re-attachment branch in bpf_tracing_prog_attach
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix re-attachment branch in bpf_tracing_prog_attach
The following case can cause a crash due to missing attach_btf:
1) load rawtp program
2) load fentry program with rawtp as target_fd
3) create tracing link for fentry program with target_fd = 0
4) repeat 3
In the end we have:
- prog->aux->dst_trampoline == NULL
- tgt_prog == NULL (because we did not provide target_fd to link_create)
- prog->aux->attach_btf == NULL (the program was loaded with attach_prog_fd=X)
- the program was loaded for tgt_prog but we have no way to find out which one
BUG: kernel NULL pointer dereference, address: 0000000000000058
Call Trace:
<TASK>
? __die+0x20/0x70
? page_fault_oops+0x15b/0x430
? fixup_exception+0x22/0x330
? exc_page_fault+0x6f/0x170
? asm_exc_page_fault+0x22/0x30
? bpf_tracing_prog_attach+0x279/0x560
? btf_obj_id+0x5/0x10
bpf_tracing_prog_attach+0x439/0x560
__sys_bpf+0x1cf4/0x2de0
__x64_sys_bpf+0x1c/0x30
do_syscall_64+0x41/0xf0
entry_SYSCALL_64_after_hwframe+0x6e/0x76
Return -EINVAL in this situation.
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: bpf: Se corrigió la rama de re-adjunción en bpf_tracing_prog_attach El siguiente caso puede causar un bloqueo debido a la falta de adjunto_btf: 1) cargar el programa rawtp 2) cargar el programa fentry con rawtp como target_fd 3) crear enlace de seguimiento para el programa fentry con target_fd = 0 4) repetir 3 Al final tenemos: - prog->aux->dst_trampoline == NULL - tgt_prog == NULL (porque no proporcionamos target_fd para link_create) - prog->aux ->attach_btf == NULL (el programa se cargó con adjunto_prog_fd=X) - el programa se cargó para tgt_prog pero no tenemos forma de averiguar cuál ERROR: desreferencia del puntero NULL del núcleo, dirección: 0000000000000058 Seguimiento de llamadas: ? __morir+0x20/0x70 ? page_fault_oops+0x15b/0x430? fixup_exception+0x22/0x330? exc_page_fault+0x6f/0x170? asm_exc_page_fault+0x22/0x30? bpf_tracing_prog_attach+0x279/0x560? btf_obj_id+0x5/0x10 bpf_tracing_prog_attach+0x439/0x560 __sys_bpf+0x1cf4/0x2de0 __x64_sys_bpf+0x1c/0x30 do_syscall_64+0x41/0xf0 Entry_SYSCALL_64_after_hwframe+0x6e/ 0x76 Devuelve -EINVAL en esta situación.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-02-19 CVE Reserved
- 2024-02-22 CVE Published
- 2024-03-19 EPSS Updated
- 2024-08-02 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-476: NULL Pointer Dereference
CAPEC
References (6)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/f3a95075549e0e5c36db922caf86847db7a35403 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
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" | >= 5.13 < 5.15.148 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.13 < 5.15.148" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.13 < 6.1.75 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.13 < 6.1.75" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.13 < 6.6.14 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.13 < 6.6.14" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.13 < 6.7.2 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.13 < 6.7.2" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.13 < 6.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.13 < 6.8" | en |
Affected
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