CVE-2024-36971
Android Kernel Remote Code Execution Vulnerability
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
YesDecision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
net: fix __dst_negative_advice() race
__dst_negative_advice() does not enforce proper RCU rules when
sk->dst_cache must be cleared, leading to possible UAF.
RCU rules are that we must first clear sk->sk_dst_cache,
then call dst_release(old_dst).
Note that sk_dst_reset(sk) is implementing this protocol correctly,
while __dst_negative_advice() uses the wrong order.
Given that ip6_negative_advice() has special logic
against RTF_CACHE, this means each of the three ->negative_advice()
existing methods must perform the sk_dst_reset() themselves.
Note the check against NULL dst is centralized in
__dst_negative_advice(), there is no need to duplicate
it in various callbacks.
Many thanks to Clement Lecigne for tracking this issue.
This old bug became visible after the blamed commit, using UDP sockets.
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: net: fix __dst_negative_advice() race __dst_negative_advice() no aplica las reglas adecuadas de RCU cuando se debe borrar sk->dst_cache, lo que genera una posible UAF. Las reglas de RCU son que primero debemos borrar sk->sk_dst_cache y luego llamar a dst_release(old_dst). Tenga en cuenta que sk_dst_reset(sk) implementa este protocolo correctamente, mientras que __dst_negative_advice() utiliza el orden incorrecto. Dado que ip6_negative_advice() tiene una lógica especial contra RTF_CACHE, esto significa que cada uno de los tres ->negative_advice() métodos existentes debe realizar sk_dst_reset() ellos mismos. Tenga en cuenta que la verificación de NULL dst está centralizada en __dst_negative_advice(), no es necesario duplicarla en varias devoluciones de llamada. Muchas gracias a Clement Lecigne por dar seguimiento a este problema. Este antiguo error se hizo visible después de la confirmación culpada, utilizando sockets UDP.
A use-after-free flaw was found in the Linux kernel's network route management. This flaw allows an attacker to alter the behavior of certain network connections.
Android contains an unspecified vulnerability in the kernel that allows for remote code execution. This vulnerability resides in Linux Kernel and could impact other products, including but not limited to Android OS.
CVSS Scores
SSVC
- Decision:Act
Timeline
- 2024-05-30 CVE Reserved
- 2024-06-10 CVE Published
- 2024-08-07 Exploited in Wild
- 2024-08-08 EPSS Updated
- 2024-08-28 KEV Due Date
- 2024-11-05 CVE Updated
- ---------- First Exploit
CWE
- CWE-416: Use After Free
CAPEC
References (11)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2024-36971 | 2024-08-26 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2292331 | 2024-08-26 |
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" | >= 4.6 < 4.19.316 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.6 < 4.19.316" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.6 < 5.4.278 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.6 < 5.4.278" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.6 < 5.10.219 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.6 < 5.10.219" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.6 < 5.15.161 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.6 < 5.15.161" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.6 < 6.1.94 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.6 < 6.1.94" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.6 < 6.6.34 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.6 < 6.6.34" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.6 < 6.9.4 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.6 < 6.9.4" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.6 < 6.10 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.6 < 6.10" | en |
Affected
| ||||||