Vulnerability in xhtml2pdf

[ Description ]Official description

xhtml2pdf before 0.2.19 contains an OS command injection vulnerability in pisa.startViewer() that allows attackers to execute commands by interpolating unescaped file names into os.system. Attackers can supply an input file whose name contains a double quote and shell metacharacters, which runs OS commands as the invoking user when the pisa tool is used with -s/--start-viewer.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• github.com/xhtml2pdf/xhtml2pdf/blob/v0.2.18/xhtml2pdf/pisa.py
• github.com/xhtml2pdf/xhtml2pdf/commit/f86380dad15b3a6810201d08755a3ee6b19d5063
• github.com/xhtml2pdf/xhtml2pdf/pull/835
• github.com/xhtml2pdf/xhtml2pdf/releases/tag/v0.2.19
• www.vulncheck.com/advisories/xhtml2pdf-before-0.2.19-os-command-injection-via-startview…