CVE-2024-39487

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxf9de11a165943a55e0fbda714caf60eaeb276a42 < 6a8a4fd082c439e19fede027e80c79bc4c84bb8eaffected
LinuxLinuxf9de11a165943a55e0fbda714caf60eaeb276a42 < 6b21346b399fd1336fe59233a17eb5ce73041ee1affected
LinuxLinuxf9de11a165943a55e0fbda714caf60eaeb276a42 < 707c85ba3527ad6aa25552033576b0f1ff835d7baffected
LinuxLinuxf9de11a165943a55e0fbda714caf60eaeb276a42 < bfd14e5915c2669f292a31d028e75dcd82f1e7e9affected
LinuxLinuxf9de11a165943a55e0fbda714caf60eaeb276a42 < c8eb8ab9a44ff0e73492d0a12a643c449f641a9faffected
LinuxLinuxf9de11a165943a55e0fbda714caf60eaeb276a42 < b75e33eae8667084bd4a63e67657c6a5a0f8d1e8affected
LinuxLinuxf9de11a165943a55e0fbda714caf60eaeb276a42 < 9f835e48bd4c75fdf6a9cff3f0b806a7abde78daaffected
LinuxLinuxf9de11a165943a55e0fbda714caf60eaeb276a42 < e271ff53807e8f2c628758290f0e499dbe51cb3daffected
LinuxLinux3.13affected
LinuxLinux0 < 3.13unaffected
LinuxLinux4.19.318 <= 4.19.*unaffected
LinuxLinux5.4.280 <= 5.4.*unaffected
LinuxLinux5.10.222 <= 5.10.*unaffected
LinuxLinux5.15.163 <= 5.15.*unaffected
LinuxLinux6.1.98 <= 6.1.*unaffected
LinuxLinux6.6.39 <= 6.6.*unaffected
LinuxLinux6.9.9 <= 6.9.*unaffected
LinuxLinux6.10 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References