FreeBSD is a modern operating system for x86, amd64, Alpha, IA-64, PC-98
and SPARC architectures. It's based on the UNIX operating system, BSD,
which was created at the University of California, Berkeley. More
information can be obtained from the FreeBSD Project web site at
http://www.FreeBSD.org/
II. DESCRIPTION
Local exploitation of a input validation error in the FreeBSD Project's
i386_set_ldt() kernel implementation could allow attackers to create a
kernel panic, leading to a denial of service condition on the affected
computer.
III. ANALYSIS
Exploitation of this vulnerability would result in a denial of service
condition on the affected host. There is a potential for arbitrary code
execution in kernel context due to the way this function manipulates
kernel heap memory.
IV. DETECTION
iDefense has confirmed the existence of this problem in FreeBSD 5.5. It
is suspected that versions as early as 5.2 are also affected.
V. WORKAROUND
iDefense is not aware of any workaround for this issue.
VI. VENDOR RESPONSE
"It appears that the problem you have discovered was fixed in revision
1.96 of src/sys/i386/i386/sys_machdep.c on March 23, 2005, after being
found by the Coverity Prevent analysis tool; the commit message at the
time documented this as a local denial of service bug.
The policy of the FreeBSD Security Team is that local denial of service bugs
not be treated as security issues; it is possible that this problem will be
corrected in a future Erratum."
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2006-4172 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org), which standardizes names for
security problems.
Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDefense. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically, please
email customerservice@idefense.com for permission.
Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct, indirect,
or consequential loss or damage arising from use of, or reliance on,
this information.
{"id": "SECURITYVULNS:DOC:14417", "bulletinFamily": "software", "title": "iDefense Security Advisory 09.23.06: FreeBSD i386_set_ldt Integer Overflow Vulnerability", "description": "FreeBSD i386_set_ldt Integer Overflow Vulnerability\r\n\r\niDefense Security Advisory 09.23.06\r\nhttp://www.idefense.com/intelligence/vulnerabilities/\r\nSep 23, 2006\r\n\r\nI. BACKGROUND\r\n\r\nFreeBSD is a modern operating system for x86, amd64, Alpha, IA-64, PC-98\r\nand SPARC architectures. It's based on the UNIX operating system, BSD,\r\nwhich was created at the University of California, Berkeley. More\r\ninformation can be obtained from the FreeBSD Project web site at\r\nhttp://www.FreeBSD.org/\r\n\r\nII. DESCRIPTION\r\n\r\nLocal exploitation of a input validation error in the FreeBSD Project's\r\ni386_set_ldt() kernel implementation could allow attackers to create a\r\nkernel panic, leading to a denial of service condition on the affected\r\ncomputer.\r\n\r\nIII. ANALYSIS\r\n\r\nExploitation of this vulnerability would result in a denial of service\r\ncondition on the affected host. There is a potential for arbitrary code\r\nexecution in kernel context due to the way this function manipulates\r\nkernel heap memory. \r\n\r\nIV. DETECTION\r\n\r\niDefense has confirmed the existence of this problem in FreeBSD 5.5. It\r\nis suspected that versions as early as 5.2 are also affected.\r\n\r\nV. WORKAROUND\r\n\r\niDefense is not aware of any workaround for this issue.\r\n\r\nVI. VENDOR RESPONSE\r\n\r\n"It appears that the problem you have discovered was fixed in revision\r\n1.96 of src/sys/i386/i386/sys_machdep.c on March 23, 2005, after being\r\nfound by the Coverity Prevent analysis tool; the commit message at the\r\ntime documented this as a local denial of service bug.\r\n\r\nThe policy of the FreeBSD Security Team is that local denial of service bugs\r\nnot be treated as security issues; it is possible that this problem will be\r\ncorrected in a future Erratum."\r\n\r\nVII. CVE INFORMATION\r\n\r\nThe Common Vulnerabilities and Exposures (CVE) project has assigned the\r\nname CVE-2006-4172 to this issue. This is a candidate for inclusion in\r\nthe CVE list (http://cve.mitre.org), which standardizes names for\r\nsecurity problems.\r\n\r\nVIII. DISCLOSURE TIMELINE\r\n\r\n08/16/2006 Initial vendor notification\r\n08/16/2006 Initial vendor response\r\n09/23/2006 Public disclosure\r\n\r\nIX. CREDIT\r\n\r\nThe discoverer of this vulnerability wishes to remain anonymous.\r\n\r\nGet paid for vulnerability research\r\nhttp://www.idefense.com/methodology/vulnerability/vcp.php\r\n\r\nFree tools, research and upcoming events\r\nhttp://labs.idefense.com/\r\n\r\nX. LEGAL NOTICES\r\n\r\nCopyright \u00a9 2006 iDefense, Inc.\r\n\r\nPermission is granted for the redistribution of this alert\r\nelectronically. It may not be edited in any way without the express\r\nwritten consent of iDefense. If you wish to reprint the whole or any\r\npart of this alert in any other medium other than electronically, please\r\nemail customerservice@idefense.com for permission.\r\n\r\nDisclaimer: The information in the advisory is believed to be accurate\r\nat the time of publishing based on currently available information. Use\r\nof the information constitutes acceptance for use in an AS IS condition.\r\nThere are no warranties with regard to this information. Neither the\r\nauthor nor the publisher accepts any liability for any direct, indirect,\r\nor consequential loss or damage arising from use of, or reliance on,\r\nthis information.\r\n", "published": "2006-09-26T00:00:00", "modified": "2006-09-26T00:00:00", "cvss": {"score": 7.2, "vector": "AV:LOCAL/AC:LOW/Au:NONE/C:COMPLETE/I:COMPLETE/A:COMPLETE/"}, "href": "https://vulners.com/securityvulns/SECURITYVULNS:DOC:14417", "reporter": "Securityvulns", "references": [], "cvelist": ["CVE-2006-4172"], "type": "securityvulns", "lastseen": "2018-08-31T11:10:19", "edition": 1, "viewCount": 2, "enchantments": {"score": {"value": 6.6, "vector": "NONE", "modified": "2018-08-31T11:10:19", "rev": 2}, "dependencies": {"references": [{"type": "cve", "idList": ["CVE-2006-4172"]}, {"type": "osvdb", "idList": ["OSVDB:29167"]}], "modified": "2018-08-31T11:10:19", "rev": 2}, "vulnersScore": 6.6}, "affectedSoftware": []}
{"cve": [{"lastseen": "2021-02-02T05:27:23", "description": "Integer overflow vulnerability in the i386_set_ldt call in FreeBSD 5.5, and possibly earlier versions down to 5.2, allows local users to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2006-4178.", "edition": 6, "cvss3": {}, "published": "2006-09-26T02:07:00", "title": "CVE-2006-4172", "type": "cve", "cwe": ["NVD-CWE-Other"], "bulletinFamily": "NVD", "cvss2": {"severity": "HIGH", "exploitabilityScore": 3.9, "obtainAllPrivilege": true, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 7.2, "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "obtainUserPrivilege": false}, "cvelist": ["CVE-2006-4172"], "modified": "2018-10-17T21:33:00", "cpe": ["cpe:/o:freebsd:freebsd:5.5", "cpe:/o:freebsd:freebsd:5.2.1", "cpe:/o:freebsd:freebsd:5.2", "cpe:/o:freebsd:freebsd:5.3", "cpe:/o:freebsd:freebsd:5.4"], "id": "CVE-2006-4172", "href": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2006-4172", "cvss": {"score": 7.2, "vector": "AV:L/AC:L/Au:N/C:C/I:C/A:C"}, "cpe23": ["cpe:2.3:o:freebsd:freebsd:5.4:*:*:*:*:*:*:*", "cpe:2.3:o:freebsd:freebsd:5.5:*:*:*:*:*:*:*", "cpe:2.3:o:freebsd:freebsd:5.2.1:*:*:*:*:*:*:*", "cpe:2.3:o:freebsd:freebsd:5.3:*:*:*:*:*:*:*", "cpe:2.3:o:freebsd:freebsd:5.2:*:*:*:*:*:*:*"]}], "osvdb": [{"lastseen": "2017-04-28T13:20:25", "bulletinFamily": "software", "cvelist": ["CVE-2006-4172"], "edition": 1, "description": "# No description provided by the source\n\n## References:\n[Secunia Advisory ID:22064](https://secuniaresearch.flexerasoftware.com/advisories/22064/)\n[Related OSVDB ID: 29168](https://vulners.com/osvdb/OSVDB:29168)\nOther Advisory URL: http://www.idefense.com/intelligence/vulnerabilities/display.php?id=414\nMail List Post: http://archives.neohapsis.com/archives/bugtraq/2006-09/0410.html\n[CVE-2006-4172](https://vulners.com/cve/CVE-2006-4172)\n", "modified": "2006-09-23T06:19:04", "published": "2006-09-23T06:19:04", "href": "https://vulners.com/osvdb/OSVDB:29167", "id": "OSVDB:29167", "title": "FreeBSD i386_set_ldt() Local Overflow DoS", "type": "osvdb", "cvss": {"score": 7.2, "vector": "AV:LOCAL/AC:LOW/Au:NONE/C:COMPLETE/I:COMPLETE/A:COMPLETE/"}}]}
