CVE-2021-47388
mac80211: fix use-after-free in CCMP/GCMP RX
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
mac80211: fix use-after-free in CCMP/GCMP RX
When PN checking is done in mac80211, for fragmentation we need
to copy the PN to the RX struct so we can later use it to do a
comparison, since commit bf30ca922a0c ("mac80211: check defrag
PN against current frame").
Unfortunately, in that commit I used the 'hdr' variable without
it being necessarily valid, so use-after-free could occur if it
was necessary to reallocate (parts of) the frame.
Fix this by reloading the variable after the code that results
in the reallocations, if any.
This fixes https://bugzilla.kernel.org/show_bug.cgi?id=214401.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mac80211: corrige el use after free en CCMP/GCMP RX. Cuando se realiza la verificación de PN en mac80211, para la fragmentación necesitamos copiar el PN a la estructura RX para poder usarlo más tarde. para hacer una comparación, desde la confirmación bf30ca922a0c ("mac80211: verifique la desfragmentación PN con el marco actual"). Desafortunadamente, en esa confirmación utilicé la variable 'hdr' sin que fuera necesariamente válida, por lo que podría ocurrir un use after free si fuera necesario reasignar (partes de) el marco. Solucione este problema recargando la variable después del código que da como resultado las reasignaciones, si corresponde. Esto corrige https://bugzilla.kernel.org/show_bug.cgi?id=214401.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-05-21 CVE Reserved
- 2024-05-21 CVE Published
- 2024-05-22 EPSS Updated
- 2024-09-11 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (16)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/608b0a2ae928a74a2f89e02227339dd79cdb63cf | Vuln. Introduced | |
| https://git.kernel.org/stable/c/d0f613fe6de344dc17ba04a88921a2094c13d3fa | Vuln. Introduced | |
| https://git.kernel.org/stable/c/a9b57952fed41556c950a92123086724eaf11919 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/0f716b48ed25503e6961f4b5b40ece36f7e4ed26 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/c8b3a6150dc8ac78d5fdd5fbdfc4806249ef8b2c | Vuln. Introduced | |
| https://git.kernel.org/stable/c/e64ea0597050157f926ac2ba9b478a44ee5be945 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/bf30ca922a0c0176007e074b0acc77ed345e9990 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/1f0bf30c01d3f4de7d6c5e27b102a808c5646676 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
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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" | >= 4.4.271 < 4.4.286 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.4.271 < 4.4.286" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.9.271 < 4.9.285 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9.271 < 4.9.285" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.14.235 < 4.14.249 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.14.235 < 4.14.249" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.19.193 < 4.19.209 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.19.193 < 4.19.209" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.4.124 < 5.4.151 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4.124 < 5.4.151" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.10.42 < 5.10.71 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10.42 < 5.10.71" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.13 < 5.14.10 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.13 < 5.14.10" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.13 < 5.15 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.13 < 5.15" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.12.9 Search vendor "Linux" for product "Linux Kernel" and version "5.12.9" | en |
Affected
| ||||||