CVSS: 7.5EPSS: 0%CPEs: 4EXPL: 1CVE-2022-2309 – NULL Pointer Dereference in lxml/lxml
https://notcve.org/view.php?id=CVE-2022-2309
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. • https://github.com/lxml/lxml/commit/86368e9cf70a0ad23cccd5ee32de847149af0c6f https://huntr.dev/bounties/8264e74f-edda-4c40-9956-49de635105ba https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HGYC6L7ENH5VEGN3YWFBYMGKX6WNS7HZ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/URHHSIBTPTALXMECRLAC2EVDNAFSR5NO https://security.gentoo.org/glsa/202208-06 https://security.netapp.com/advisory/ntap-20220915-0006 https://access.redhat.com/security/cve/CVE-2022- • CWE-476: NULL Pointer Dereference •
CVSS: 8.8EPSS: 1%CPEs: 16EXPL: 0CVE-2021-43818 – HTML Cleaner allows crafted and SVG embedded scripts to pass through
https://notcve.org/view.php?id=CVE-2021-43818
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. lxml es una biblioteca para procesar XML y HTML en el lenguaje Python. En versiones anteriores a 4.6.5, el limpiador de HTML en lxml.html dejaba pasar determinado contenido de scripts manipulados, así como contenido de scripts en archivos SVG insertados usando URIs de datos. • https://github.com/lxml/lxml/commit/12fa9669007180a7bb87d990c375cf91ca5b664a https://github.com/lxml/lxml/commit/a3eacbc0dcf1de1c822ec29fb7d090a4b1712a9c#diff-59130575b4fb2932c957db2922977d7d89afb0b2085357db1a14615a2fcad776 https://github.com/lxml/lxml/commit/f2330237440df7e8f39c3ad1b1aa8852be3b27c0 https://github.com/lxml/lxml/security/advisories/GHSA-55x5-fj6c-h6m8 https://lists.debian.org/debian-lts-announce/2021/12/msg00037.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUIS2KE3HZ2AAQKXFLTJFZPP2IFHJTC7 https:/ • CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •
CVSS: 6.1EPSS: 0%CPEs: 7EXPL: 1CVE-2021-28957 – python-lxml: Missing input sanitization for formaction HTML5 attributes may lead to XSS
https://notcve.org/view.php?id=CVE-2021-28957
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. Se ha descubierto una vulnerabilidad XSS en las versiones del módulo clean de python-lxml anteriores a la versión 4.6.3. • https://bugs.launchpad.net/lxml/+bug/1888153 https://github.com/lxml/lxml/commit/a5f9cb52079dc57477c460dbe6ba0f775e14a999 https://github.com/lxml/lxml/pull/316/commits/10ec1b4e9f93713513a3264ed6158af22492f270 https://lists.debian.org/debian-lts-announce/2021/03/msg00031.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3C2R44VDUY7FJVMAVRZ2WY7XYL4SVN45 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XXN3QPWCTQVOGW4BMWV3AUUZZ4NRZNSQ https://security • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •
CVSS: 6.1EPSS: 0%CPEs: 10EXPL: 2CVE-2020-27783 – python-lxml: mXSS due to the use of improper parser
https://notcve.org/view.php?id=CVE-2020-27783
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. Se detectó una vulnerabilidad de tipo XSS en el módulo de limpieza de python-lxml. El analizador del módulo no imitaba apropiadamente los navegadores, lo que causaba comportamientos diferentes entre el sanitizador y la página del usuario. • https://advisory.checkmarx.net/advisory/CX-2020-4286 https://bugzilla.redhat.com/show_bug.cgi?id=1901633 https://lists.debian.org/debian-lts-announce/2020/12/msg00028.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKG67GPGTV23KADT4D4GK4RMHSO4CIQL https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMHVKRUT22LVWNL3TB7HPSDHJT74Q3JK https://security.netapp.com/advisory/ntap-20210521-0003 https://www.debian.org/security/2020/dsa-481 • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •
CVSS: 6.1EPSS: 0%CPEs: 6EXPL: 0CVE-2018-19787
https://notcve.org/view.php?id=CVE-2018-19787
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. Se ha descubierto un problema en lxml en versiones anteriores a la 4.2.5. lxml/html/clean.py en el módulo 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. • https://github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109 https://lists.debian.org/debian-lts-announce/2018/12/msg00001.html https://lists.debian.org/debian-lts-announce/2020/11/msg00044.html https://usn.ubuntu.com/3841-1 https://usn.ubuntu.com/3841-2 • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •