cve-2023-52618
Vulnerability from cvelistv5
Published
2024-03-18 10:19
Modified
2024-12-19 08:22
Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
block/rnbd-srv: Check for unlikely string overflow
Since "dev_search_path" can technically be as large as PATH_MAX,
there was a risk of truncation when copying it and a second string
into "full_path" since it was also PATH_MAX sized. The W=1 builds were
reporting this warning:
drivers/block/rnbd/rnbd-srv.c: In function 'process_msg_open.isra':
drivers/block/rnbd/rnbd-srv.c:616:51: warning: '%s' directive output may be truncated writing up to 254 bytes into a region of size between 0 and 4095 [-Wformat-truncation=]
616 | snprintf(full_path, PATH_MAX, "%s/%s",
| ^~
In function 'rnbd_srv_get_full_path',
inlined from 'process_msg_open.isra' at drivers/block/rnbd/rnbd-srv.c:721:14: drivers/block/rnbd/rnbd-srv.c:616:17: note: 'snprintf' output between 2 and 4351 bytes into a destination of size 4096
616 | snprintf(full_path, PATH_MAX, "%s/%s",
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
617 | dev_search_path, dev_name);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~
To fix this, unconditionally check for truncation (as was already done
for the case where "%SESSNAME%" was present).
References
Impacted products
| Vendor | Product | Version | |||||
|---|---|---|---|---|---|---|---|
| ▼ | Linux | Linux |
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 |
||||
|
|||||||
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Dado que \\\"dev_search_path\\\" t\u00e9cnicamente puede ser tan grande como PATH_MAX, exist\u00eda el riesgo de truncamiento al copiarlo y una segunda cadena en \\\" full_path\\\" ya que tambi\u00e9n ten\u00eda un tama\u00f1o PATH_MAX. Las compilaciones W=1 informaban esta advertencia: drivers/block/rnbd/rnbd-srv.c: En funci\u00f3n \u0027process_msg_open.isra\u0027: drivers/block/rnbd/rnbd-srv.c:616:51: advertencia: \u0027% La salida de la directiva s se puede truncar escribiendo hasta 254 bytes en una regi\u00f3n de tama\u00f1o entre 0 y 4095 [-Wformat-truncation=] 616 | snprintf(full_path, PATH_MAX, \\\"%s/%s\\\", | ^~ En la funci\u00f3n \u0027rnbd_srv_get_full_path\u0027, insertada desde \u0027process_msg_open.isra\u0027 en drivers/block/rnbd/rnbd-srv.c:721:14: drivers/block /rnbd/rnbd-srv.c:616:17: nota: \u0027snprintf\u0027 genera entre 2 y 4351 bytes en un destino de tama\u00f1o 4096 616 | snprintf(full_path, PATH_MAX, \\\"%s/%s\\\", | ^~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 617 | dev_search_path, dev_name); | ~~~~~~~ ~~~~~~~~~~~~~~~~~~~ Para solucionar este problema, verifique incondicionalmente el truncamiento (como ya se hizo en el caso en el que \\\"%SESSNAME%\\\" estaba presente).\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5b9ea86e662035a886ccb5c76d56793cba618827\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/95bc866c11974d3e4a9d922275ea8127ff809cf7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9e4bf6a08d1e127bcc4bd72557f2dfafc6bc7f41\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a2c6206f18104fba7f887bf4dbbfe4c41adc4339\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/af7bbdac89739e2e7380387fda598848d3b7010f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f6abd5e17da33eba15df2bddc93413e76c2b55f7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5b9ea86e662035a886ccb5c76d56793cba618827\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/95bc866c11974d3e4a9d922275ea8127ff809cf7\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/9e4bf6a08d1e127bcc4bd72557f2dfafc6bc7f41\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/a2c6206f18104fba7f887bf4dbbfe4c41adc4339\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/af7bbdac89739e2e7380387fda598848d3b7010f\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/f6abd5e17da33eba15df2bddc93413e76c2b55f7\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
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}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.