CVE-2024-39487: bonding: Fix out-of-bounds read in bond_option_arp_ip_targets_set()
First published: Tue Jul 09 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: bonding: Fix out-of-bounds read in bond_option_arp_ip_targets_set() In function bond_option_arp_ip_targets_set(), if newval->string is an empty string, newval->string+1 will point to the byte after the string, causing an out-of-bound read. BUG: KASAN: slab-out-of-bounds in strlen+0x7d/0xa0 lib/string.c:418 Read of size 1 at addr ffff8881119c4781 by task syz-executor665/8107 CPU: 1 PID: 8107 Comm: syz-executor665 Not tainted 6.7.0-rc7 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xc1/0x5e0 mm/kasan/report.c:475 kasan_report+0xbe/0xf0 mm/kasan/report.c:588 strlen+0x7d/0xa0 lib/string.c:418 __fortify_strlen include/linux/fortify-string.h:210 [inline] in4_pton+0xa3/0x3f0 net/core/utils.c:130 bond_option_arp_ip_targets_set+0xc2/0x910 drivers/net/bonding/bond_options.c:1201 __bond_opt_set+0x2a4/0x1030 drivers/net/bonding/bond_options.c:767 __bond_opt_set_notify+0x48/0x150 drivers/net/bonding/bond_options.c:792 bond_opt_tryset_rtnl+0xda/0x160 drivers/net/bonding/bond_options.c:817 bonding_sysfs_store_option+0xa1/0x120 drivers/net/bonding/bond_sysfs.c:156 dev_attr_store+0x54/0x80 drivers/base/core.c:2366 sysfs_kf_write+0x114/0x170 fs/sysfs/file.c:136 kernfs_fop_write_iter+0x337/0x500 fs/kernfs/file.c:334 call_write_iter include/linux/fs.h:2020 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x96a/0xd80 fs/read_write.c:584 ksys_write+0x122/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b ---[ end trace ]--- Fix it by adding a check of string length before using it.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=3.13<4.19.318 | |
| Linux Linux kernel | >=4.20<5.4.280 | |
| Linux Linux kernel | >=5.5<5.10.222 | |
| Linux Linux kernel | >=5.11<5.15.163 | |
| Linux Linux kernel | >=5.16<6.1.98 | |
| Linux Linux kernel | >=6.2<6.6.39 | |
| Linux Linux kernel | >=6.7<6.9.9 | |
| Linux Linux kernel | =6.10-rc1 | |
| Linux Linux kernel | =6.10-rc2 | |
| Linux Linux kernel | =6.10-rc3 | |
| Linux Linux kernel | =6.10-rc4 | |
| Linux Linux kernel | =6.10-rc5 | |
| Linux Linux kernel | =6.10-rc6 | |
| redhat/kernel | <6.10 | 6.10 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.7-1 6.11.9-1 |
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Reference Links
- https://git.kernel.org/stable/c/6a8a4fd082c439e19fede027e80c79bc4c84bb8e
- https://git.kernel.org/stable/c/6b21346b399fd1336fe59233a17eb5ce73041ee1
- https://git.kernel.org/stable/c/707c85ba3527ad6aa25552033576b0f1ff835d7b
- https://git.kernel.org/stable/c/bfd14e5915c2669f292a31d028e75dcd82f1e7e9
- https://git.kernel.org/stable/c/c8eb8ab9a44ff0e73492d0a12a643c449f641a9f
- https://git.kernel.org/stable/c/b75e33eae8667084bd4a63e67657c6a5a0f8d1e8
- https://git.kernel.org/stable/c/9f835e48bd4c75fdf6a9cff3f0b806a7abde78da
- https://git.kernel.org/stable/c/e271ff53807e8f2c628758290f0e499dbe51cb3d
- https://access.redhat.com/security/cve/CVE-2024-39487
- https://lore.kernel.org/linux-cve-announce/2024070912-CVE-2024-39487-f52c@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2296531
- https://access.redhat.com/errata/RHSA-2024:5102
- https://access.redhat.com/errata/RHSA-2024:5101
- https://access.redhat.com/errata/RHSA-2024:5363
- https://bugzilla.redhat.com/show_bug.cgi?id=2297056
- https://git.kernel.org/linus/e271ff53807e8f2c628758290f0e499dbe51cb3d
- https://security-tracker.debian.org/tracker/CVE-2024-39487
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-39487
- https://nvd.nist.gov/vuln/detail/CVE-2024-39487
- https://launchpad.net/bugs/cve/CVE-2024-39487
- https://ubuntu.com/security/CVE-2024-39487
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