PT-2024-25688 · Unknown · Sanitize-Html

Yzueger · Published 2024-05-06 · Updated 2024-08-26 · CVE-2024-34078

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions html-sanitizer versions prior to 2.4.2

Description The issue concerns an allowlist-based HTML cleaner. If using keep typographic whitespace=False (which is the default), the sanitizer normalizes unicode to the NFKC form at the end. Some unicode characters normalize to chevrons; this allows specially crafted HTML to escape sanitization.

Recommendations For versions prior to 2.4.2, update to version 2.4.2 to resolve the issue. As a temporary workaround, consider setting keep typographic whitespace=True explicitly, or normalize to NFKC yourself earlier.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2024-34078

DLA-3856-1

GHSA-WVHX-Q427-FGH3

Affected Products

Sanitize-Html

References · 16

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/34xxx/CVE-2024-34078.json · Exploit
• https://osv.dev/vulnerability/CVE-2024-34078 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2024-34078 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2024-34078 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2024-34078 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-3856-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-34078 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-wvhx-q427-fgh3 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-34078 · Security Note
• https://cve.org/CVERecord?id=CVE-2024-34078 · Security Note
• https://github.com/matthiask/html-sanitizer/security/advisories/GHSA-wvhx-q427-fgh3 · Note
• https://github.com/matthiask/html-sanitizer/commit/48db42fc5143d0140c32d929c46b802f96913550 · Note
• https://github.com/matthiask/html-sanitizer · Note
• https://twitter.com/CVEnew/status/1787510778787983677 · Twitter Post
• https://lists.debian.org/debian-lts-announce/2024/08/msg00000.html · Note