Search criteria
2 vulnerabilities by lxml
CVE-2022-2309 (GCVE-0-2022-2309)
Vulnerability from cvelistv5 – Published: 2022-07-05 09:00 – Updated: 2025-11-04 16:09
VLAI?
Title
NULL Pointer Dereference in lxml/lxml
Summary
NULL Pointer Dereference allows attackers to cause a denial of service (or application crash). This only applies when lxml is used together with libxml2 2.9.10 through 2.9.14. libxml2 2.9.9 and earlier are not affected. It allows triggering crashes through forged input data, given a vulnerable code sequence in the application. The vulnerability is caused by the iterwalk function (also used by the canonicalize function). Such code shouldn't be in wide-spread use, given that parsing + iterwalk would usually be replaced with the more efficient iterparse function. However, an XML converter that serialises to C14N would also be vulnerable, for example, and there are legitimate use cases for this code sequence. If untrusted input is received (also remotely) and processed via iterwalk function, a crash can be triggered.
Severity ?
5.3 (Medium)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
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CVE-2021-43818 (GCVE-0-2021-43818)
Vulnerability from cvelistv5 – Published: 2021-12-13 18:05 – Updated: 2025-12-18 15:05
VLAI?
Title
HTML Cleaner allows crafted and SVG embedded scripts to pass through
Summary
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Severity ?
8.2 (High)
CWE
Assigner
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"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component (\u0027Injection\u0027)"
}
]
},
{
"description": [
{
"lang": "eng",
"value": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://github.com/lxml/lxml/security/advisories/GHSA-55x5-fj6c-h6m8",
"refsource": "CONFIRM",
"url": "https://github.com/lxml/lxml/security/advisories/GHSA-55x5-fj6c-h6m8"
},
{
"name": "https://github.com/lxml/lxml/commit/12fa9669007180a7bb87d990c375cf91ca5b664a",
"refsource": "MISC",
"url": "https://github.com/lxml/lxml/commit/12fa9669007180a7bb87d990c375cf91ca5b664a"
},
{
"name": "https://github.com/lxml/lxml/commit/a3eacbc0dcf1de1c822ec29fb7d090a4b1712a9c#diff-59130575b4fb2932c957db2922977d7d89afb0b2085357db1a14615a2fcad776",
"refsource": "MISC",
"url": "https://github.com/lxml/lxml/commit/a3eacbc0dcf1de1c822ec29fb7d090a4b1712a9c#diff-59130575b4fb2932c957db2922977d7d89afb0b2085357db1a14615a2fcad776"
},
{
"name": "https://github.com/lxml/lxml/commit/f2330237440df7e8f39c3ad1b1aa8852be3b27c0",
"refsource": "MISC",
"url": "https://github.com/lxml/lxml/commit/f2330237440df7e8f39c3ad1b1aa8852be3b27c0"
},
{
"name": "FEDORA-2021-6e8fb79f90",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZQ4SPKJX3RRJK4UWA6FXCRHD2TVRQI44/"
},
{
"name": "FEDORA-2021-9f9e7c5c4f",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WZGNET2A4WGLSUXLBFYKNC5PXHQMI3I7/"
},
{
"name": "[debian-lts-announce] 20211230 [SECURITY] [DLA 2871-1] lxml security update",
"refsource": "MLIST",
"url": "https://lists.debian.org/debian-lts-announce/2021/12/msg00037.html"
},
{
"name": "DSA-5043",
"refsource": "DEBIAN",
"url": "https://www.debian.org/security/2022/dsa-5043"
},
{
"name": "FEDORA-2022-96c79bf003",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TUIS2KE3HZ2AAQKXFLTJFZPP2IFHJTC7/"
},
{
"name": "FEDORA-2022-7129fbaeed",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/V2XMOM5PFT6U5AAXY6EFNT5JZCKKHK2V/"
},
{
"name": "https://www.oracle.com/security-alerts/cpuapr2022.html",
"refsource": "MISC",
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"name": "https://security.netapp.com/advisory/ntap-20220107-0005/",
"refsource": "CONFIRM",
"url": "https://security.netapp.com/advisory/ntap-20220107-0005/"
},
{
"name": "https://www.oracle.com/security-alerts/cpujul2022.html",
"refsource": "MISC",
"url": "https://www.oracle.com/security-alerts/cpujul2022.html"
},
{
"name": "GLSA-202208-06",
"refsource": "GENTOO",
"url": "https://security.gentoo.org/glsa/202208-06"
}
]
},
"source": {
"advisory": "GHSA-55x5-fj6c-h6m8",
"discovery": "UNKNOWN"
}
}
}
},
"cveMetadata": {
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"assignerShortName": "GitHub_M",
"cveId": "CVE-2021-43818",
"datePublished": "2021-12-13T18:05:12.000Z",
"dateReserved": "2021-11-16T00:00:00.000Z",
"dateUpdated": "2025-12-18T15:05:59.477Z",
"state": "PUBLISHED"
},
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"dataVersion": "5.2"
}