CVE-2024-27414
rtnetlink: fix error logic of IFLA_BRIDGE_FLAGS writing back
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
rtnetlink: fix error logic of IFLA_BRIDGE_FLAGS writing back
In the commit d73ef2d69c0d ("rtnetlink: let rtnl_bridge_setlink checks
IFLA_BRIDGE_MODE length"), an adjustment was made to the old loop logic
in the function `rtnl_bridge_setlink` to enable the loop to also check
the length of the IFLA_BRIDGE_MODE attribute. However, this adjustment
removed the `break` statement and led to an error logic of the flags
writing back at the end of this function.
if (have_flags)
memcpy(nla_data(attr), &flags, sizeof(flags));
// attr should point to IFLA_BRIDGE_FLAGS NLA !!!
Before the mentioned commit, the `attr` is granted to be IFLA_BRIDGE_FLAGS.
However, this is not necessarily true fow now as the updated loop will let
the attr point to the last NLA, even an invalid NLA which could cause
overflow writes.
This patch introduces a new variable `br_flag` to save the NLA pointer
that points to IFLA_BRIDGE_FLAGS and uses it to resolve the mentioned
error logic.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: rtnetlink: corrige la lógica de error de la reescritura de IFLA_BRIDGE_FLAGS En el commit d73ef2d69c0d ("rtnetlink: let rtnl_bridge_setlink comprueba la longitud de IFLA_BRIDGE_MODE"), se realizó un ajuste a la lógica de bucle anterior en la función ` rtnl_bridge_setlink` para permitir que el bucle también verifique la longitud del atributo IFLA_BRIDGE_MODE. Sin embargo, este ajuste eliminó la declaración "break" y generó una lógica de error en la escritura de los indicadores al final de esta función. if (have_flags) memcpy(nla_data(attr), &flags, sizeof(flags)); // attr debería apuntar a IFLA_BRIDGE_FLAGS NLA !!! Antes de la confirmación mencionada, se concede que el `attr` sea IFLA_BRIDGE_FLAGS. Sin embargo, esto no es necesariamente cierto ahora, ya que el bucle actualizado permitirá que el atributo apunte al último NLA, incluso un NLA no válido que podría causar escrituras desbordadas. Este parche introduce una nueva variable `br_flag` para guardar el puntero NLA que apunta a IFLA_BRIDGE_FLAGS y lo usa para resolver la lógica de error mencionada.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-02-25 CVE Reserved
- 2024-05-17 CVE Published
- 2024-05-18 EPSS Updated
- 2024-12-19 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (16)
URL | Date | SRC |
---|
URL | Date | SRC |
---|---|---|
https://access.redhat.com/security/cve/CVE-2024-27414 | 2024-11-12 | |
https://bugzilla.redhat.com/show_bug.cgi?id=2281103 | 2024-11-12 |
Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
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Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.4.253 < 5.4.271 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4.253 < 5.4.271" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.10.190 < 5.10.212 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10.190 < 5.10.212" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.15.126 < 5.15.151 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15.126 < 5.15.151" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.1.45 < 6.1.81 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.1.45 < 6.1.81" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.5 < 6.6.21 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.5 < 6.6.21" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.5 < 6.7.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.5 < 6.7.9" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.5 < 6.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.5 < 6.8" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 6.4.10 Search vendor "Linux" for product "Linux Kernel" and version "6.4.10" | en |
Affected
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