fkie_cve-2023-52618
Vulnerability from fkie_nvd
Published
2024-03-18 11:15
Modified
2025-04-04 14:51
Severity ?
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_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| debian | debian_linux | 10.0 |
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock/rnbd-srv: Check for unlikely string overflow\n\nSince \"dev_search_path\" can technically be as large as PATH_MAX,\nthere was a risk of truncation when copying it and a second string\ninto \"full_path\" since it was also PATH_MAX sized. The W=1 builds were\nreporting this warning:\n\ndrivers/block/rnbd/rnbd-srv.c: In function \u0027process_msg_open.isra\u0027:\ndrivers/block/rnbd/rnbd-srv.c:616:51: warning: \u0027%s\u0027 directive output may be truncated writing up to 254 bytes into a region of size between 0 and 4095 [-Wformat-truncation=]\n 616 | snprintf(full_path, PATH_MAX, \"%s/%s\",\n | ^~\nIn function \u0027rnbd_srv_get_full_path\u0027,\n inlined from \u0027process_msg_open.isra\u0027 at drivers/block/rnbd/rnbd-srv.c:721:14: drivers/block/rnbd/rnbd-srv.c:616:17: note: \u0027snprintf\u0027 output between 2 and 4351 bytes into a destination of size 4096\n 616 | snprintf(full_path, PATH_MAX, \"%s/%s\",\n | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n 617 | dev_search_path, dev_name);\n | ~~~~~~~~~~~~~~~~~~~~~~~~~~\n\nTo fix this, unconditionally check for truncation (as was already done\nfor the case where \"%SESSNAME%\" was present)."
},
{
"lang": "es",
"value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: block/rnbd-srv: Comprueba si hay un desbordamiento de cadena improbable. 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)."
}
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"id": "CVE-2023-52618",
"lastModified": "2025-04-04T14:51:32.453",
"metrics": {
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
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"published": "2024-03-18T11:15:09.110",
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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.
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