Vulnerabilites related to lxml - lxml
cve-2022-2309
Vulnerability from cvelistv5
Published
2022-07-05 09:00
Modified
2024-08-03 00:32
Severity ?
EPSS score ?
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.
References
| ▼ | URL | Tags |
|---|---|---|
| https://huntr.dev/bounties/8264e74f-edda-4c40-9956-49de635105ba | x_refsource_CONFIRM | |
| https://github.com/lxml/lxml/commit/86368e9cf70a0ad23cccd5ee32de847149af0c6f | x_refsource_MISC | |
| https://security.gentoo.org/glsa/202208-06 | vendor-advisory, x_refsource_GENTOO | |
| https://security.netapp.com/advisory/ntap-20220915-0006/ | x_refsource_CONFIRM | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/URHHSIBTPTALXMECRLAC2EVDNAFSR5NO/ | vendor-advisory, x_refsource_FEDORA | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HGYC6L7ENH5VEGN3YWFBYMGKX6WNS7HZ/ | vendor-advisory, x_refsource_FEDORA |
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cve-2021-28957
Vulnerability from cvelistv5
Published
2021-03-21 04:39
Modified
2024-08-03 21:55
Severity ?
EPSS score ?
Summary
An XSS vulnerability was discovered in python-lxml's clean module versions before 4.6.3. When disabling the safe_attrs_only and forms arguments, the Cleaner class does not remove the formaction attribute allowing for JS to bypass the sanitizer. A remote attacker could exploit this flaw to run arbitrary JS code on users who interact with incorrectly sanitized HTML. This issue is patched in lxml 4.6.3.
References
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cve-2020-27783
Vulnerability from cvelistv5
Published
2020-12-03 16:39
Modified
2024-08-04 16:25
Severity ?
EPSS score ?
Summary
A XSS vulnerability was discovered in python-lxml's clean module. The module's parser didn't properly imitate browsers, which caused different behaviors between the sanitizer and the user's page. A remote attacker could exploit this flaw to run arbitrary HTML/JS code.
References
| ▼ | URL | Tags |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1901633 | x_refsource_MISC | |
| https://www.debian.org/security/2020/dsa-4810 | vendor-advisory, x_refsource_DEBIAN | |
| https://lists.debian.org/debian-lts-announce/2020/12/msg00028.html | mailing-list, x_refsource_MLIST | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMHVKRUT22LVWNL3TB7HPSDHJT74Q3JK/ | vendor-advisory, x_refsource_FEDORA | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKG67GPGTV23KADT4D4GK4RMHSO4CIQL/ | vendor-advisory, x_refsource_FEDORA | |
| https://www.oracle.com//security-alerts/cpujul2021.html | x_refsource_MISC | |
| https://advisory.checkmarx.net/advisory/CX-2020-4286 | x_refsource_MISC | |
| https://security.netapp.com/advisory/ntap-20210521-0003/ | x_refsource_CONFIRM |
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| n/a | python-lxml |
Version: lxml-4.6.2 |
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cve-2021-43818
Vulnerability from cvelistv5
Published
2021-12-13 18:05
Modified
2024-08-04 04:03
Severity ?
EPSS score ?
Summary
lxml is a library for processing XML and HTML in the Python language. Prior to version 4.6.5, the HTML Cleaner in lxml.html lets certain crafted script content pass through, as well as script content in SVG files embedded using data URIs. Users that employ the HTML cleaner in a security relevant context should upgrade to lxml 4.6.5 to receive a patch. There are no known workarounds available.
References
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cve-2014-3146
Vulnerability from cvelistv5
Published
2014-05-14 19:00
Modified
2024-08-06 10:35
Severity ?
EPSS score ?
Summary
Incomplete blacklist vulnerability in the lxml.html.clean module in lxml before 3.3.5 allows remote attackers to conduct cross-site scripting (XSS) attacks via control characters in the link scheme to the clean_html function.
References
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cve-2018-19787
Vulnerability from cvelistv5
Published
2018-12-02 10:00
Modified
2024-08-05 11:44
Severity ?
EPSS score ?
Summary
An issue was discovered in lxml before 4.2.5. lxml/html/clean.py in the lxml.html.clean module does not remove javascript: URLs that use escaping, allowing a remote attacker to conduct XSS attacks, as demonstrated by "j a v a s c r i p t:" in Internet Explorer. This is a similar issue to CVE-2014-3146.
References
| ▼ | URL | Tags |
|---|---|---|
| https://usn.ubuntu.com/3841-1/ | vendor-advisory, x_refsource_UBUNTU | |
| https://lists.debian.org/debian-lts-announce/2018/12/msg00001.html | mailing-list, x_refsource_MLIST | |
| https://usn.ubuntu.com/3841-2/ | vendor-advisory, x_refsource_UBUNTU | |
| https://github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109 | x_refsource_MISC | |
| https://lists.debian.org/debian-lts-announce/2020/11/msg00044.html | mailing-list, x_refsource_MLIST |
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Vulnerability from fkie_nvd
Published
2020-12-03 17:15
Modified
2024-11-21 05:21
Severity ?
Summary
A XSS vulnerability was discovered in python-lxml's clean module. The module's parser didn't properly imitate browsers, which caused different behaviors between the sanitizer and the user's page. A remote attacker could exploit this flaw to run arbitrary HTML/JS code.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| lxml | lxml | * | |
| redhat | software_collections | - | |
| redhat | enterprise_linux | 8.0 | |
| debian | debian_linux | 9.0 | |
| debian | debian_linux | 10.0 | |
| fedoraproject | fedora | 32 | |
| fedoraproject | fedora | 33 | |
| netapp | snapcenter | - | |
| oracle | communications_offline_mediation_controller | 12.0.0.3.0 | |
| oracle | zfs_storage_appliance_kit | 8.8 |
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"value": "Se detect\u00f3 una vulnerabilidad de tipo XSS en el m\u00f3dulo de limpieza de python-lxml. El analizador del m\u00f3dulo no imitaba apropiadamente los navegadores, lo que causaba comportamientos diferentes entre el sanitizador y la p\u00e1gina del usuario. Un atacante remoto podr\u00eda explotar este fallo para ejecutar c\u00f3digo HTML/JS arbitrario"
}
],
"id": "CVE-2020-27783",
"lastModified": "2024-11-21T05:21:49.663",
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"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Modified",
"weaknesses": [
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"value": "CWE-79"
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"type": "Primary"
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}
Vulnerability from fkie_nvd
Published
2018-12-02 10:29
Modified
2024-11-21 03:58
Severity ?
Summary
An issue was discovered in lxml before 4.2.5. lxml/html/clean.py in the lxml.html.clean module does not remove javascript: URLs that use escaping, allowing a remote attacker to conduct XSS attacks, as demonstrated by "j a v a s c r i p t:" in Internet Explorer. This is a similar issue to CVE-2014-3146.
References
| ▼ | URL | Tags | |
|---|---|---|---|
| cve@mitre.org | https://github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109 | Patch, Vendor Advisory | |
| cve@mitre.org | https://lists.debian.org/debian-lts-announce/2018/12/msg00001.html | Mailing List, Third Party Advisory | |
| cve@mitre.org | https://lists.debian.org/debian-lts-announce/2020/11/msg00044.html | ||
| cve@mitre.org | https://usn.ubuntu.com/3841-1/ | Third Party Advisory | |
| cve@mitre.org | https://usn.ubuntu.com/3841-2/ | Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109 | Patch, Vendor Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.debian.org/debian-lts-announce/2018/12/msg00001.html | Mailing List, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.debian.org/debian-lts-announce/2020/11/msg00044.html | ||
| af854a3a-2127-422b-91ae-364da2661108 | https://usn.ubuntu.com/3841-1/ | Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://usn.ubuntu.com/3841-2/ | Third Party Advisory |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| lxml | lxml | * | |
| debian | debian_linux | 8.0 | |
| canonical | ubuntu_linux | 12.04 | |
| canonical | ubuntu_linux | 14.04 | |
| canonical | ubuntu_linux | 16.04 | |
| canonical | ubuntu_linux | 18.04 |
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},
{
"lang": "es",
"value": "Se ha descubierto un problema en lxml en versiones anteriores a la 4.2.5. lxml/html/clean.py en el m\u00f3dulo lxml.html.clean no elimina las URL javascript: que utilizan escapado, permitiendo que un atacante remoto realice ataques Cross-Site Scripting (XSS), tal y como queda demostrado con \"j a v a s c r i p t:\" en Internet Explorer. Este es un problema aparte, pero similar a CVE-2014-3146."
}
],
"id": "CVE-2018-19787",
"lastModified": "2024-11-21T03:58:33.303",
"metrics": {
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],
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"vulnStatus": "Modified",
"weaknesses": [
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{
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"value": "CWE-79"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
Vulnerability from fkie_nvd
Published
2014-05-14 19:55
Modified
2024-11-21 02:07
Severity ?
Summary
Incomplete blacklist vulnerability in the lxml.html.clean module in lxml before 3.3.5 allows remote attackers to conduct cross-site scripting (XSS) attacks via control characters in the link scheme to the clean_html function.
References
Impacted products
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],
"cveTags": [],
"descriptions": [
{
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"value": "Incomplete blacklist vulnerability in the lxml.html.clean module in lxml before 3.3.5 allows remote attackers to conduct cross-site scripting (XSS) attacks via control characters in the link scheme to the clean_html function."
},
{
"lang": "es",
"value": "Vulnerabilidad de lista negra incompleta en el m\u00f3dulo lxml.html.clean en lxml anterior a 3.3.5 permite a atacantes remotos realizar ataques de XSS a trav\u00e9s de caracteres de control en la esquema de enlace hacia la funci\u00f3n clean_html."
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],
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"lastModified": "2024-11-21T02:07:32.220",
"metrics": {
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"baseSeverity": "MEDIUM",
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"references": [
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}
Vulnerability from fkie_nvd
Published
2021-12-13 18:15
Modified
2024-11-21 06:29
Severity ?
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N
7.1 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
7.1 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Summary
lxml is a library for processing XML and HTML in the Python language. Prior to version 4.6.5, the HTML Cleaner in lxml.html lets certain crafted script content pass through, as well as script content in SVG files embedded using data URIs. Users that employ the HTML cleaner in a security relevant context should upgrade to lxml 4.6.5 to receive a patch. There are no known workarounds available.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| lxml | lxml | * | |
| fedoraproject | fedora | 34 | |
| fedoraproject | fedora | 35 | |
| debian | debian_linux | 9.0 | |
| debian | debian_linux | 10.0 | |
| debian | debian_linux | 11.0 | |
| netapp | solidfire | - | |
| netapp | solidfire_enterprise_sds | - | |
| netapp | hci_storage_node_firmware | - | |
| netapp | hci_storage_node | - | |
| oracle | communications_cloud_native_core_binding_support_function | 22.1.3 | |
| oracle | communications_cloud_native_core_network_exposure_function | 22.1.1 | |
| oracle | communications_cloud_native_core_policy | 22.2.0 | |
| oracle | http_server | 12.2.1.3.0 | |
| oracle | http_server | 12.2.1.4.0 | |
| oracle | zfs_storage_appliance_kit | 8.8 |
{
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Vulnerability from fkie_nvd
Published
2021-03-21 05:15
Modified
2024-11-21 06:00
Severity ?
Summary
An XSS vulnerability was discovered in python-lxml's clean module versions before 4.6.3. When disabling the safe_attrs_only and forms arguments, the Cleaner class does not remove the formaction attribute allowing for JS to bypass the sanitizer. A remote attacker could exploit this flaw to run arbitrary JS code on users who interact with incorrectly sanitized HTML. This issue is patched in lxml 4.6.3.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| lxml | lxml | * | |
| debian | debian_linux | 9.0 | |
| debian | debian_linux | 10.0 | |
| fedoraproject | fedora | 33 | |
| fedoraproject | fedora | 34 | |
| netapp | snapcenter | - | |
| oracle | zfs_storage_appliance_kit | 8.8 |
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Vulnerability from fkie_nvd
Published
2022-07-05 10:15
Modified
2024-11-21 07:00
Severity ?
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.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| lxml | lxml | * | |
| xmlsoft | libxml2 | * | |
| fedoraproject | fedora | 36 | |
| fedoraproject | fedora | 37 |
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