// For flags

CVE-2024-39487

bonding: Fix out-of-bounds read in bond_option_arp_ip_targets_set()

Severity Score

5.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

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.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bonding: corrige la lectura fuera de los límites en bond_option_arp_ip_targets_set() En la función bond_option_arp_ip_targets_set(), si newval-&gt;string es una cadena vacía, newval-&gt;string+1 apuntará a el byte después de la cadena, lo que provoca una lectura fuera de los límites. ERROR: KASAN: slab-out-of-bounds en strlen+0x7d/0xa0 lib/string.c:418 Lectura del tamaño 1 en la dirección ffff8881119c4781 por tarea syz-executor665/8107 CPU: 1 PID: 8107 Comm: syz-executor665 No tainted 6.7.0-rc7 #1 Nombre del hardware: PC estándar QEMU (i440FX + PIIX, 1996), BIOS 1.15.0-1 01/04/2014 Seguimiento de llamadas: __dump_stack lib/dump_stack.c:88 [en línea] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [en línea] 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 [en línea] in4_pton+0xa3/0x3f0 net/core/utils.c:130 bond_option_arp_ip_targets_set+0xc2/0x910 controladores /net/bonding/bond_options.c:1201 __bond_opt_set+0x2a4/0x1030 controladores/net/bonding/bond_options.c: 767 __bond_opt_set_notify+0x48/0x150 Drivers/net/bonding/bond_options.c: 792 bond_pt_tryset neto /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 [en línea] new_sync_write fs/read_write.c:491 [en línea] 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 [en línea] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x63/0x6 ---[rastreo final]--- Solucionelo agregando una verificación de la longitud de la cadena antes de usarlo.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-06-25 CVE Reserved
  • 2024-07-09 CVE Published
  • 2024-08-02 CVE Updated
  • 2024-08-22 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
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"
>= 3.13 < 4.19.318
Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 4.19.318"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 3.13 < 5.4.280
Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 5.4.280"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 3.13 < 5.10.222
Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 5.10.222"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 3.13 < 5.15.163
Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 5.15.163"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 3.13 < 6.1.98
Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 6.1.98"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 3.13 < 6.6.39
Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 6.6.39"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 3.13 < 6.9.9
Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 6.9.9"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 3.13 < 6.10
Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 6.10"
en
Affected