gsd-2017-9047
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
A buffer overflow was discovered in libxml2 20904-GITv2.9.4-16-g0741801. The function xmlSnprintfElementContent in valid.c is supposed to recursively dump the element content definition into a char buffer 'buf' of size 'size'. The variable len is assigned strlen(buf). If the content->type is XML_ELEMENT_CONTENT_ELEMENT, then (i) the content->prefix is appended to buf (if it actually fits) whereupon (ii) content->name is written to the buffer. However, the check for whether the content->name actually fits also uses 'len' rather than the updated buffer length strlen(buf). This allows us to write about "size" many bytes beyond the allocated memory. This vulnerability causes programs that use libxml2, such as PHP, to crash.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2017-9047",
"description": "A buffer overflow was discovered in libxml2 20904-GITv2.9.4-16-g0741801. The function xmlSnprintfElementContent in valid.c is supposed to recursively dump the element content definition into a char buffer \u0027buf\u0027 of size \u0027size\u0027. The variable len is assigned strlen(buf). If the content-\u003etype is XML_ELEMENT_CONTENT_ELEMENT, then (i) the content-\u003eprefix is appended to buf (if it actually fits) whereupon (ii) content-\u003ename is written to the buffer. However, the check for whether the content-\u003ename actually fits also uses \u0027len\u0027 rather than the updated buffer length strlen(buf). This allows us to write about \"size\" many bytes beyond the allocated memory. This vulnerability causes programs that use libxml2, such as PHP, to crash.",
"id": "GSD-2017-9047",
"references": [
"https://www.suse.com/security/cve/CVE-2017-9047.html",
"https://www.debian.org/security/2017/dsa-3952",
"https://access.redhat.com/errata/RHSA-2018:2486",
"https://ubuntu.com/security/CVE-2017-9047",
"https://advisories.mageia.org/CVE-2017-9047.html"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
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"details": "A buffer overflow was discovered in libxml2 20904-GITv2.9.4-16-g0741801. The function xmlSnprintfElementContent in valid.c is supposed to recursively dump the element content definition into a char buffer \u0027buf\u0027 of size \u0027size\u0027. The variable len is assigned strlen(buf). If the content-\u003etype is XML_ELEMENT_CONTENT_ELEMENT, then (i) the content-\u003eprefix is appended to buf (if it actually fits) whereupon (ii) content-\u003ename is written to the buffer. However, the check for whether the content-\u003ename actually fits also uses \u0027len\u0027 rather than the updated buffer length strlen(buf). This allows us to write about \"size\" many bytes beyond the allocated memory. This vulnerability causes programs that use libxml2, such as PHP, to crash.",
"id": "GSD-2017-9047",
"modified": "2023-12-13T01:21:08.238137Z",
"schema_version": "1.4.0"
}
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{
"affected_range": "[2.9.4]",
"affected_versions": "Version 2.9.4",
"cvss_v2": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
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"cwe_ids": [
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"CWE-119",
"CWE-937"
],
"date": "2021-06-29",
"description": "A buffer overflow was discovered in libxml2 . The function xmlSnprintfElementContent in valid.c is supposed to recursively dump the element content definition into a char buffer \u0027buf\u0027 of size \u0027size\u0027. The variable len is assigned strlen(buf). If the content-\u003etype is XML_ELEMENT_CONTENT_ELEMENT, then (i) the content-\u003eprefix is appended to buf (if it actually fits) whereupon (ii) content-\u003ename is written to the buffer. However, the check for whether the content-\u003ename actually fits also uses \u0027len\u0027 rather than the updated buffer length strlen(buf). This allows us to write about \"size\" many bytes beyond the allocated memory. This vulnerability causes programs that use libxml2, such as PHP, to crash.",
"fixed_versions": [],
"identifier": "CVE-2017-9047",
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"not_impacted": "",
"package_slug": "nuget/libxml2",
"pubdate": "2017-05-18",
"solution": "Unfortunately, there is no solution available yet.",
"title": "Improper Restriction of Operations within the Bounds of a Memory Buffer",
"urls": [
"https://nvd.nist.gov/vuln/detail/CVE-2017-9047"
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"uuid": "e89ea665-d3cc-48f2-a2a4-428b7ed8ec85"
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"impact": {
"baseMetricV2": {
"acInsufInfo": true,
"cvssV2": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "MEDIUM",
"userInteractionRequired": false
},
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.0"
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"exploitabilityScore": 3.9,
"impactScore": 3.6
}
},
"lastModifiedDate": "2021-06-29T15:15Z",
"publishedDate": "2017-05-18T06:29Z"
}
}
}
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- 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.