发布时间: 2024年5月27日
修改时间: 2024年5月27日
In the Linux kernel, the following vulnerability has been resolved:bpf: Fix re-attachment branch in bpf_tracing_prog_attachThe following case can cause a crash due to missing attach_btf:1) load rawtp program2) load fentry program with rawtp as target_fd3) create tracing link for fentry program with target_fd = 04) repeat 3In 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/0x76Return -EINVAL in this situation.
| NVD | openEuler | |
|---|---|---|
| CVSS评分 | 5.5 | 5.5 |
| Attack Vector | Local | Local |
| Attack Complexity | Low | Low |
| Privileges Required | Low | Low |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality | None | None |
| Integrity | None | None |
| Availability | High | High |
| 公告名 | 概要 | 发布时间 |
|---|---|---|
| KylinSec-SA-2024-2229 | In the Linux kernel, the following vulnerability has been resolved:bpf: Fix re-attachment branch in bpf_tracing_prog_attachThe following case can cause a crash due to missing attach_btf:1) load rawtp program2) load fentry program with rawtp as target_fd3) create tracing link for fentry program with target_fd = 04) repeat 3In 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/0x76Return -EINVAL in this situation. | 2024年5月27日 |
| 产品 | 包 | 状态 |
|---|---|---|
| KY3.4-4A | kernel | Unaffected |
| KY3.4-5A | kernel | Unaffected |
| KY3.5.1 | kernel | Unaffected |
| KY3.5.2 | kernel | Unaffected |
