The cr_parser_parse_selector_core function in cr-parser.c in libcroco 0.6.12 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a crafted CSS file.

References

• https://nvd.nist.gov/vuln/detail/CVE-2017-8871
• https://bugzilla.gnome.org/show_bug.cgi?id=782649
• https://www.exploit-db.com/exploits/42147/
• http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00043.html
• http://www.openwall.com/lists/oss-security/2020/08/13/3