Source: highlight.js Version: 9.18.1+dfsg1-2 Severity: important Tags: security upstream Forwarded: https://github.com/highlightjs/highlight.js/pull/2636 X-Debbugs-Cc: car...@debian.org, Debian Security Team <t...@security.debian.org> Control: found -1 9.12.0+dfsg1-4
Hi, The following vulnerability was published for highlight.js. CVE-2020-26237[0]: | Highlight.js is a syntax highlighter written in JavaScript. | Highlight.js versions before 9.18.2 and 10.1.2 are vulnerable to | Prototype Pollution. A malicious HTML code block can be crafted that | will result in prototype pollution of the base object's prototype | during highlighting. If you allow users to insert custom HTML code | blocks into your page/app via parsing Markdown code blocks (or | similar) and do not filter the language names the user can provide you | may be vulnerable. The pollution should just be harmless data but this | can cause problems for applications not expecting these properties to | exist and can result in strange behavior or application crashes, i.e. | a potential DOS vector. If your website or application does not render | user provided data it should be unaffected. Versions 9.18.2 and 10.1.2 | and newer include fixes for this vulnerability. If you are using | version 7 or 8 you are encouraged to upgrade to a newer release. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2020-26237 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26237 [1] https://github.com/highlightjs/highlight.js/pull/2636 [2] https://github.com/highlightjs/highlight.js/security/advisories/GHSA-vfrc-7r7c-w9mx Please adjust the affected versions in the BTS as needed. Regards, Salvatore -- System Information: Debian Release: bullseye/sid APT prefers unstable APT policy: (500, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 5.10.0-rc6-amd64 (SMP w/8 CPU threads) Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled