Vulnerability-Lookup

VAR-201008-0304

Vulnerability from variot - Updated: 2025-04-11 23:05

The webdav_mount function in webdav_vfsops.c in the WebDAV kernel extension (aka webdav_fs.kext) for Mac OS X 10.6 allows local users to cause a denial of service (panic) via a mount request with a large integer in the pa_socket_namelen field. Attackers can exploit this issue to trigger a kernel panic resulting in a denial-of-service condition. Mac OS X is a BSD-derived operating system developed and maintained by Apple.

==Notes on Disclosure==

My disclosure of this issue prior to an official fix is not meant to be taken as a statement against Apple's management of security issues. Local denial-of-service issues are by nature low impact - many security teams do not regard these as security-relevant at all.\xa0 I believe the chances of exploitation of this in real life are practically non-existent.\xa0 Given that the vulnerability resides in an open source kernel extension, I chose to disclose this issue so that concerned administrators can apply a fix immediately, while the rest of us can benefit from a little increased awareness of potentially unsafe memory allocation situations.\xa0 Apple's security team was contacted prior to disclosure, and I'm sure they'll incorporate a fix in a future release.

==Solution==

The WebDAV kernel extension can be obtained online [2].\xa0 The following patch can be applied to this extension, after which it should be recompiled to replace the existing extension at /System/Library/Extensions/webdav_fs.kext:

--- webdav_fs.kextproj.orig/webdav_fs.kmodproj/webdav_vfsops.c 2010-07-21 09:51:09.000000000 -0400 +++ webdav_fs.kextproj/webdav_fs.kmodproj/webdav_vfsops.c 2010-07-21 10:32:43.000000000 -0400 @@ -319,6 +319,12 @@ static int webdav_mount(struct mount *mp \xa0\xa0\xa0\xa0 }

\xa0\xa0\xa0\xa0 /* Get the server sockaddr from the args */ +\xa0\xa0\xa0 if(args.pa_socket_namelen > NAME_MAX) +\xa0\xa0\xa0 { +\xa0\xa0\xa0 \xa0\xa0\xa0 error = EINVAL; +\xa0\xa0\xa0 \xa0\xa0\xa0 goto bad; +\xa0\xa0\xa0 } + \xa0\xa0\xa0\xa0 MALLOC(fmp->pm_socket_name, struct sockaddr *, args.pa_socket_namelen, M_TEMP, M_WAITOK); \xa0\xa0\xa0\xa0 error = copyin(args.pa_socket_name, fmp->pm_socket_name, args.pa_socket_namelen); \xa0\xa0\xa0\xa0 if (error)

==Credits==

This vulnerability was discovered by Dan Rosenberg (dan.j.rosenberg@gmail.com).

==References==

CVE identifier CVE-2010-1794 has been assigned to this issue by Apple.

[1] http://en.wikipedia.org/wiki/WebDAV [2] http://opensource.apple.com/source/webdavfs/webdavfs-293/webdav_fs.kextproj/webdav_fs.kmodproj/

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    "data": "The webdav_mount function in webdav_vfsops.c in the WebDAV kernel extension (aka webdav_fs.kext) for Mac OS X 10.6 allows local users to cause a denial of service (panic) via a mount request with a large integer in the pa_socket_namelen field. \nAttackers can exploit this issue to trigger a kernel panic resulting in a denial-of-service condition. Mac OS X is a BSD-derived operating system developed and maintained by Apple. \n\n==Notes on Disclosure==\n\nMy disclosure of this issue prior to an official fix is not meant to\nbe taken as a statement against Apple\u0027s management of security issues. \n Local denial-of-service issues are by nature low impact - many\nsecurity teams do not regard these as security-relevant at all.\\xa0 I\nbelieve the chances of exploitation of this in real life are\npractically non-existent.\\xa0 Given that the vulnerability resides in an\nopen source kernel extension, I chose to disclose this issue so that\nconcerned administrators can apply a fix immediately, while the rest\nof us can benefit from a little increased awareness of potentially\nunsafe memory allocation situations.\\xa0 Apple\u0027s security team was\ncontacted prior to disclosure, and I\u0027m sure they\u0027ll incorporate a fix\nin a future release. \n\n==Solution==\n\nThe WebDAV kernel extension can be obtained online [2].\\xa0 The following\npatch can be applied to this extension, after which it should be\nrecompiled to replace the existing extension at\n/System/Library/Extensions/webdav_fs.kext:\n\n--- webdav_fs.kextproj.orig/webdav_fs.kmodproj/webdav_vfsops.c\n2010-07-21 09:51:09.000000000 -0400\n+++ webdav_fs.kextproj/webdav_fs.kmodproj/webdav_vfsops.c\n2010-07-21 10:32:43.000000000 -0400\n@@ -319,6 +319,12 @@ static int webdav_mount(struct mount *mp\n\\xa0\\xa0\\xa0\\xa0 }\n\n\\xa0\\xa0\\xa0\\xa0 /* Get the server sockaddr from the args */\n+\\xa0\\xa0\\xa0 if(args.pa_socket_namelen \u003e NAME_MAX)\n+\\xa0\\xa0\\xa0 {\n+\\xa0\\xa0\\xa0 \\xa0\\xa0\\xa0 error = EINVAL;\n+\\xa0\\xa0\\xa0 \\xa0\\xa0\\xa0 goto bad;\n+\\xa0\\xa0\\xa0 }\n+\n\\xa0\\xa0\\xa0\\xa0 MALLOC(fmp-\u003epm_socket_name, struct sockaddr *,\nargs.pa_socket_namelen, M_TEMP, M_WAITOK);\n\\xa0\\xa0\\xa0\\xa0 error = copyin(args.pa_socket_name, fmp-\u003epm_socket_name,\nargs.pa_socket_namelen);\n\\xa0\\xa0\\xa0\\xa0 if (error)\n\n\n==Credits==\n\nThis vulnerability was discovered by Dan Rosenberg (dan.j.rosenberg@gmail.com). \n\n==References==\n\nCVE identifier CVE-2010-1794 has been assigned to this issue by Apple. \n\n[1] http://en.wikipedia.org/wiki/WebDAV\n[2] http://opensource.apple.com/source/webdavfs/webdavfs-293/webdav_fs.kextproj/webdav_fs.kmodproj/\n",
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CVE-2010-1794 (GCVE-0-2010-1794)

Vulnerability from cvelistv5 – Published: 2010-08-02 19:00 – Updated: 2024-08-07 01:35

Summary

Severity

No CVSS data available.

CWE

Assigner

apple CNA under the mitre root

CNA scorecard E 37/100 over 902 records in the last 180 days details

References

3 references

URL	Tags
http://www.securityfocus.com/archive/1/512642/100…	mailing-listx_refsource_BUGTRAQ
http://securitytracker.com/id?1024250	vdb-entryx_refsource_SECTRACK
http://www.securityfocus.com/bid/41958	vdb-entryx_refsource_BID

Date Public

2010-07-26 00:00

Show details on NVD website

JSON

To clipboard

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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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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