SUSE update for python3-lxml

1) Cross-site scripting

EUVDB-ID: #VU51777

Risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-28957

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. 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 can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Update the affected package python3-lxml to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server for SAP Applications: 12-SP3 - 12-SP5

SUSE Linux Enterprise High Performance Computing: 12

SUSE Linux Enterprise Module for Public Cloud: 12

SUSE Linux Enterprise Server: 12-SP2-LTSS-ERICSSON - 12-SP5

python3-lxml-doc: before 3.3.5-3.15.1

python3-lxml: before 3.3.5-3.15.1

CPE2.3

• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap_applications:12-SP3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap_applications:12-SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap_applications:12-SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_high_performance_computing:12:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_module_for_public_cloud:12:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:12-SP2-LTSS-ERICSSON:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:12-SP3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:12-SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:python3-lxml-doc:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:python3-lxml:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20223934-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.