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.

CVSS v3.0 6.1 MEDIUM
CVSS v2.0 4.3 MEDIUM

6.1^/10

CVSS v3.0 : MEDIUM

Vector : AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:N/I:P/A:N

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109	Patch Vendor Advisory
https://lists.debian.org/debian-lts-announce/2018/12/msg00001.html	Mailing List Third Party Advisory
https://usn.ubuntu.com/3841-2/	Third Party Advisory
https://usn.ubuntu.com/3841-1/	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/11/msg00044.html

Advertisement

Configurations

Configuration 1 (hide)

cpe:2.3:a:lxml:lxml:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

Configuration 3 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:12.04::::esm:::

Information

Published : 2018-12-02 02:29

Updated : 2020-11-26 13:15

NVD link : CVE-2018-19787

Mitre link : CVE-2018-19787

JSON object : View

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Advertisement

Products Affected

debian

debian_linux

canonical

ubuntu_linux

lxml

lxml

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109", "name": "https://github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109", "tags": ["Patch", "Vendor Advisory"], "refsource": "MISC"}, {"url": "https://lists.debian.org/debian-lts-announce/2018/12/msg00001.html", "name": "[debian-lts-announce] 20181210 [SECURITY] [DLA 1604-1] lxml security update", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MLIST"}, {"url": "https://usn.ubuntu.com/3841-2/", "name": "USN-3841-2", "tags": ["Third Party Advisory"], "refsource": "UBUNTU"}, {"url": "https://usn.ubuntu.com/3841-1/", "name": "USN-3841-1", "tags": ["Third Party Advisory"], "refsource": "UBUNTU"}, {"url": "https://lists.debian.org/debian-lts-announce/2020/11/msg00044.html", "name": "[debian-lts-announce] 20201126 [SECURITY] [DLA 2467-1] lxml security update", "tags": [], "refsource": "MLIST"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-79"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2018-19787", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 4.3, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "NONE", "confidentialityImpact": "NONE"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 2.9, "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}, "baseMetricV3": {"cvssV3": {"scope": "CHANGED", "version": "3.0", "baseScore": 6.1, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.8}}, "publishedDate": "2018-12-02T10:29Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:lxml:lxml:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "4.2.5"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2020-11-26T21:15Z"}