CVE-2024-27414 (GCVE-0-2024-27414)

Vulnerability from cvelistv5 – Published: 2024-05-17 11:50 – Updated: 2026-05-11 20:10
VLAI?
Title
rtnetlink: fix error logic of IFLA_BRIDGE_FLAGS writing back
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ad46d4861ed36315d3d9e838723ba3e367ecc042 , < b9fbc44159dfc3e9a7073032752d9e03f5194a6f (git)
Affected: abb0172fa8dc4a4ec51aa992b7269ed65959f310 , < 882a51a10ecf24ce135d573afa0872aef02c5125 (git)
Affected: 047508edd602921ee8bb0f2aa2100aa2e9bedc75 , < a1227b27fcccc99dc44f912b479e01a17e2d7d31 (git)
Affected: 8dfac8071d58447e5cace4c4c6fe493ce2f615f6 , < f2261eb994aa5757c1da046b78e3229a3ece0ad9 (git)
Affected: d73ef2d69c0dba5f5a1cb9600045c873bab1fb7f , < 167d8642daa6a44b51de17f8ff0f584e1e762db7 (git)
Affected: d73ef2d69c0dba5f5a1cb9600045c873bab1fb7f , < 831bc2728fb48a8957a824cba8c264b30dca1425 (git)
Affected: d73ef2d69c0dba5f5a1cb9600045c873bab1fb7f , < 743ad091fb46e622f1b690385bb15e3cd3daf874 (git)
Affected: 00757f58e37b2d9a6f99e15be484712390cd2bab (git)
Create a notification for this product.
Linux Linux Affected: 6.5
Unaffected: 0 , < 6.5 (semver)
Unaffected: 5.4.271 , ≤ 5.4.* (semver)
Unaffected: 5.10.212 , ≤ 5.10.* (semver)
Unaffected: 5.15.151 , ≤ 5.15.* (semver)
Unaffected: 6.1.81 , ≤ 6.1.* (semver)
Unaffected: 6.6.21 , ≤ 6.6.* (semver)
Unaffected: 6.7.9 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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However, this adjustment\\nremoved the `break` statement and led to an error logic of the flags\\nwriting back at the end of this function.\\n\\nif (have_flags)\\n    memcpy(nla_data(attr), \u0026flags, sizeof(flags));\\n    // attr should point to IFLA_BRIDGE_FLAGS NLA !!!\\n\\nBefore the mentioned commit, the `attr` is granted to be IFLA_BRIDGE_FLAGS.\\nHowever, this is not necessarily true fow now as the updated loop will let\\nthe attr point to the last NLA, even an invalid NLA which could cause\\noverflow writes.\\n\\nThis patch introduces a new variable `br_flag` to save the NLA pointer\\nthat points to IFLA_BRIDGE_FLAGS and uses it to resolve the mentioned\\nerror logic.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: rtnetlink: corrige la l\u00f3gica 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 realiz\u00f3 un ajuste a la l\u00f3gica de bucle anterior en la funci\u00f3n ` rtnl_bridge_setlink` para permitir que el bucle tambi\u00e9n verifique la longitud del atributo IFLA_BRIDGE_MODE. Sin embargo, este ajuste elimin\u00f3 la declaraci\u00f3n \\\"break\\\" y gener\u00f3 una l\u00f3gica de error en la escritura de los indicadores al final de esta funci\u00f3n. if (have_flags) memcpy(nla_data(attr), \u0026amp;flags, sizeof(flags)); // attr deber\u00eda apuntar a IFLA_BRIDGE_FLAGS NLA !!! Antes de la confirmaci\u00f3n mencionada, se concede que el `attr` sea IFLA_BRIDGE_FLAGS. Sin embargo, esto no es necesariamente cierto ahora, ya que el bucle actualizado permitir\u00e1 que el atributo apunte al \u00faltimo NLA, incluso un NLA no v\u00e1lido que podr\u00eda 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 l\u00f3gica de error 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However, this adjustment\\nremoved the `break` statement and led to an error logic of the flags\\nwriting back at the end of this function.\\n\\nif (have_flags)\\n    memcpy(nla_data(attr), \u0026flags, sizeof(flags));\\n    // attr should point to IFLA_BRIDGE_FLAGS NLA !!!\\n\\nBefore the mentioned commit, the `attr` is granted to be IFLA_BRIDGE_FLAGS.\\nHowever, this is not necessarily true fow now as the updated loop will let\\nthe attr point to the last NLA, even an invalid NLA which could cause\\noverflow writes.\\n\\nThis patch introduces a new variable `br_flag` to save the NLA pointer\\nthat points to IFLA_BRIDGE_FLAGS and uses it to resolve the mentioned\\nerror logic.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T08:54:40.197Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-27414\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T08:54:40.197Z\", \"dateReserved\": \"2024-02-25T13:47:42.682Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-17T11:50:57.207Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.