fkie_cve-2006-0459
Vulnerability from fkie_nvd
Published
2006-03-29 23:02
Modified
2025-04-03 01:03
Severity ?
Summary
flex.skl in Will Estes and John Millaway Fast Lexical Analyzer Generator (flex) before 2.5.33 does not allocate enough memory for grammars containing (1) REJECT statements or (2) trailing context rules, which causes flex to generate code that contains a buffer overflow that might allow context-dependent attackers to execute arbitrary code.
References
{
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:westes:flex:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E0145625-8490-4671-A17C-85426C258AF9",
"versionEndIncluding": "2.5.32",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "flex.skl in Will Estes and John Millaway Fast Lexical Analyzer Generator (flex) before 2.5.33 does not allocate enough memory for grammars containing (1) REJECT statements or (2) trailing context rules, which causes flex to generate code that contains a buffer overflow that might allow context-dependent attackers to execute arbitrary code."
}
],
"id": "CVE-2006-0459",
"lastModified": "2025-04-03T01:03:51.193",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 7.5,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": true,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2006-03-29T23:02:00.000",
"references": [
{
"source": "secalert@redhat.com",
"tags": [
"Product"
],
"url": "http://prdownloads.sourceforge.net/flex/flex-2.5.33.tar.bz2?download"
},
{
"source": "secalert@redhat.com",
"tags": [
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"url": "http://secunia.com/advisories/19071"
},
{
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"url": "http://secunia.com/advisories/19126"
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"url": "http://secunia.com/advisories/19228"
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{
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"url": "http://securityreason.com/securityalert/570"
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{
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"tags": [
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"url": "http://sourceforge.net/mailarchive/forum.php?thread_name=20060223020346.GA11231%40tabitha.home.tldz.org\u0026forum_name=flex-announce"
},
{
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"url": "http://www.gentoo.org/security/en/glsa/glsa-200603-07.xml"
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"tags": [
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"url": "http://www.securityfocus.com/bid/16896"
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{
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"url": "http://www.us.debian.org/security/2006/dsa-1020"
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{
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"tags": [
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{
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"tags": [
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"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/24995"
},
{
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"tags": [
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],
"url": "https://usn.ubuntu.com/260-1/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"url": "http://prdownloads.sourceforge.net/flex/flex-2.5.33.tar.bz2?download"
},
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"tags": [
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{
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{
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"tags": [
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"url": "http://secunia.com/advisories/19228"
},
{
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"tags": [
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],
"url": "http://secunia.com/advisories/19424"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "http://securityreason.com/securityalert/570"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "http://sourceforge.net/mailarchive/forum.php?thread_name=20060223020346.GA11231%40tabitha.home.tldz.org\u0026forum_name=flex-announce"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "http://www.gentoo.org/security/en/glsa/glsa-200603-07.xml"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"Patch"
],
"url": "http://www.osvdb.org/23440"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/16896"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "http://www.us.debian.org/security/2006/dsa-1020"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"URL Repurposed"
],
"url": "http://www.vupen.com/english/advisories/2006/0770"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"VDB Entry"
],
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/24995"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://usn.ubuntu.com/260-1/"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vendorComments": [
{
"comment": "This issue only affects parsers which are generated by grammars which either use REJECT or rules with a variable trailing context (in these rules the parser has to keep all backtracking paths). The Red Hat Security Response Team analysed all packages that include flex generated parsers in Red Hat Enterprise Linux (2.1, 3, and 4) and found none were vulnerable.\n",
"lastModified": "2006-08-16T00:00:00",
"organization": "Red Hat"
}
],
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-119"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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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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