CVE-2021-47288 (GCVE-0-2021-47288)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:34 – Updated: 2025-05-04 07:07
VLAI?
Title
media: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf()
Summary
In the Linux kernel, the following vulnerability has been resolved: media: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf() Fix an 11-year old bug in ngene_command_config_free_buf() while addressing the following warnings caught with -Warray-bounds: arch/alpha/include/asm/string.h:22:16: warning: '__builtin_memcpy' offset [12, 16] from the object at 'com' is out of the bounds of referenced subobject 'config' with type 'unsigned char' at offset 10 [-Warray-bounds] arch/x86/include/asm/string_32.h:182:25: warning: '__builtin_memcpy' offset [12, 16] from the object at 'com' is out of the bounds of referenced subobject 'config' with type 'unsigned char' at offset 10 [-Warray-bounds] The problem is that the original code is trying to copy 6 bytes of data into a one-byte size member _config_ of the wrong structue FW_CONFIGURE_BUFFERS, in a single call to memcpy(). This causes a legitimate compiler warning because memcpy() overruns the length of &com.cmd.ConfigureBuffers.config. It seems that the right structure is FW_CONFIGURE_FREE_BUFFERS, instead, because it contains 6 more members apart from the header _hdr_. Also, the name of the function ngene_command_config_free_buf() suggests that the actual intention is to ConfigureFreeBuffers, instead of ConfigureBuffers (which takes place in the function ngene_command_config_buf(), above). Fix this by enclosing those 6 members of struct FW_CONFIGURE_FREE_BUFFERS into new struct config, and use &com.cmd.ConfigureFreeBuffers.config as the destination address, instead of &com.cmd.ConfigureBuffers.config, when calling memcpy(). This also helps with the ongoing efforts to globally enable -Warray-bounds and get us closer to being able to tighten the FORTIFY_SOURCE routines on memcpy().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: dae52d009fc950b5c209260d50fcc000f5becd3c , < 4487b968e5eacd02c493303dc2b61150bb7fe4b2 (git)
Affected: dae52d009fc950b5c209260d50fcc000f5becd3c , < c6ddeb63dd543b5474b0217c4e47538b7ffd7686 (git)
Affected: dae52d009fc950b5c209260d50fcc000f5becd3c , < e818f2ff648581a6c553ae2bebc5dcef9a8bb90c (git)
Affected: dae52d009fc950b5c209260d50fcc000f5becd3c , < ec731c6ef564ee6fc101fc5d73e3a3a953d09a00 (git)
Affected: dae52d009fc950b5c209260d50fcc000f5becd3c , < e617fa62f6cf859a7b042cdd6c73af905ff8fca3 (git)
Affected: dae52d009fc950b5c209260d50fcc000f5becd3c , < e991457afdcb5f4dbc5bc9d79eaf775be33e7092 (git)
Affected: dae52d009fc950b5c209260d50fcc000f5becd3c , < b9a178f189bb6d75293573e181928735f5e3e070 (git)
Affected: dae52d009fc950b5c209260d50fcc000f5becd3c , < 8d4abca95ecc82fc8c41912fa0085281f19cc29f (git)
Create a notification for this product.
    Linux Linux Affected: 2.6.34
Unaffected: 0 , < 2.6.34 (semver)
Unaffected: 4.4.277 , ≤ 4.4.* (semver)
Unaffected: 4.9.277 , ≤ 4.9.* (semver)
Unaffected: 4.14.241 , ≤ 4.14.* (semver)
Unaffected: 4.19.199 , ≤ 4.19.* (semver)
Unaffected: 5.4.136 , ≤ 5.4.* (semver)
Unaffected: 5.10.54 , ≤ 5.10.* (semver)
Unaffected: 5.13.6 , ≤ 5.13.* (semver)
Unaffected: 5.14 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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\"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.54\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13.6\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.13.*\"}, {\"status\": \"unaffected\", \"version\": \"5.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/media/pci/ngene/ngene-core.c\", \"drivers/media/pci/ngene/ngene.h\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/4487b968e5eacd02c493303dc2b61150bb7fe4b2\"}, {\"url\": \"https://git.kernel.org/stable/c/c6ddeb63dd543b5474b0217c4e47538b7ffd7686\"}, {\"url\": \"https://git.kernel.org/stable/c/e818f2ff648581a6c553ae2bebc5dcef9a8bb90c\"}, {\"url\": \"https://git.kernel.org/stable/c/ec731c6ef564ee6fc101fc5d73e3a3a953d09a00\"}, {\"url\": \"https://git.kernel.org/stable/c/e617fa62f6cf859a7b042cdd6c73af905ff8fca3\"}, {\"url\": \"https://git.kernel.org/stable/c/e991457afdcb5f4dbc5bc9d79eaf775be33e7092\"}, {\"url\": \"https://git.kernel.org/stable/c/b9a178f189bb6d75293573e181928735f5e3e070\"}, {\"url\": \"https://git.kernel.org/stable/c/8d4abca95ecc82fc8c41912fa0085281f19cc29f\"}], \"x_generator\": {\"engine\": \"bippy-a5840b7849dd\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmedia: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf()\\n\\nFix an 11-year old bug in ngene_command_config_free_buf() while\\naddressing the following warnings caught with -Warray-bounds:\\n\\narch/alpha/include/asm/string.h:22:16: warning: \u0027__builtin_memcpy\u0027 offset [12, 16] from the object at \u0027com\u0027 is out of the bounds of referenced subobject \u0027config\u0027 with type \u0027unsigned char\u0027 at offset 10 [-Warray-bounds]\\narch/x86/include/asm/string_32.h:182:25: warning: \u0027__builtin_memcpy\u0027 offset [12, 16] from the object at \u0027com\u0027 is out of the bounds of referenced subobject \u0027config\u0027 with type \u0027unsigned char\u0027 at offset 10 [-Warray-bounds]\\n\\nThe problem is that the original code is trying to copy 6 bytes of\\ndata into a one-byte size member _config_ of the wrong structue\\nFW_CONFIGURE_BUFFERS, in a single call to memcpy(). This causes a\\nlegitimate compiler warning because memcpy() overruns the length\\nof \u0026com.cmd.ConfigureBuffers.config. It seems that the right\\nstructure is FW_CONFIGURE_FREE_BUFFERS, instead, because it contains\\n6 more members apart from the header _hdr_. Also, the name of\\nthe function ngene_command_config_free_buf() suggests that the actual\\nintention is to ConfigureFreeBuffers, instead of ConfigureBuffers\\n(which takes place in the function ngene_command_config_buf(), above).\\n\\nFix this by enclosing those 6 members of struct FW_CONFIGURE_FREE_BUFFERS\\ninto new struct config, and use \u0026com.cmd.ConfigureFreeBuffers.config as\\nthe destination address, instead of \u0026com.cmd.ConfigureBuffers.config,\\nwhen calling memcpy().\\n\\nThis also helps with the ongoing efforts to globally enable\\n-Warray-bounds and get us closer to being able to tighten the\\nFORTIFY_SOURCE routines on memcpy().\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-05-29T05:05:20.262Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47288\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-08-04T05:32:08.191Z\", \"dateReserved\": \"2024-05-21T13:27:52.129Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T14:34:51.776Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

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  • 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.