CVE-2017-8871 Explained : Impact and Mitigation

A crafted CSS file can exploit the cr_parser_parse_selector_core function within libcroco 0.6.12, leading to a denial of service by causing an infinite loop and consuming excessive CPU resources.

Understanding CVE-2017-8871

This CVE entry describes a vulnerability in libcroco 0.6.12 that allows remote attackers to trigger a denial of service condition through a specially crafted CSS file.

What is CVE-2017-8871?

The cr_parser_parse_selector_core function in cr-parser.c in libcroco 0.6.12 enables attackers to execute a denial of service attack by creating an infinite loop and consuming CPU resources using a malicious CSS file.

The Impact of CVE-2017-8871

The vulnerability can be exploited remotely by attackers to disrupt the availability of services, leading to a denial of service condition.

Technical Details of CVE-2017-8871

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The cr_parser_parse_selector_core function in libcroco 0.6.12 allows remote attackers to cause a denial of service by creating an infinite loop and consuming excessive CPU resources through a crafted CSS file.

Affected Systems and Versions

Affected Version: libcroco 0.6.12
Systems: Not specified

Exploitation Mechanism

Attackers can exploit this vulnerability by providing a specially crafted CSS file to trigger the infinite loop in the cr_parser_parse_selector_core function, leading to excessive CPU consumption.

Mitigation and Prevention

Protecting systems from CVE-2017-8871 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor patches or updates to mitigate the vulnerability.
Monitor CPU usage for any unusual spikes that could indicate exploitation.

Long-Term Security Practices

Regularly update software and libraries to prevent known vulnerabilities.
Implement network and host-based intrusion detection systems to detect and block malicious activities.

Patching and Updates

Check for security advisories from the vendor and apply patches promptly to address the vulnerability.