CVE-2021-29279 : Exploit Details and Defense Strategies

An integer overflow vulnerability has been identified in GPAC 1.0.1, specifically in the function filter_core/filter_props.c:gf_props_assign_value. This issue arises when the argument

const GF_PropertyValue *value

may result in

value->value.data.size

being a negative number, leading to a failure in the

memcpy

function within

gf_props_assign_value

.

Understanding CVE-2021-29279

This CVE-2021-29279 vulnerability pertains to an integer overflow in GPAC 1.0.1, potentially exposing systems to exploitation through a specific function.

What is CVE-2021-29279?

The CVE-2021-29279 vulnerability involves an integer overflow in the GFAC library's function, resulting in a potential security risk due to a negative size value.

The Impact of CVE-2021-29279

The impact of this vulnerability is the failure of memory copying operations, leading to possible system crashes or arbitrary code execution.

Technical Details of CVE-2021-29279

This section delves into the specifics of the vulnerability, including affected systems and the exploitation mechanism.

Vulnerability Description

The vulnerability in GPAC 1.0.1 allows for an integer overflow scenario to occur in the

gf_props_assign_value

function when handling certain values, potentially crashing the system.

Affected Systems and Versions

GPAC version 1.0.1 is confirmed to be affected by this vulnerability, with the potential for exploitation under specific conditions.

Exploitation Mechanism

Exploiting CVE-2021-29279 requires crafting a specific input value that triggers the integer overflow, potentially leading to unauthorized access or denial of service.

Mitigation and Prevention

In response to CVE-2021-29279, it is crucial to take immediate action and implement long-term security measures to prevent exploitation.

Immediate Steps to Take

Immediate steps include updating GPAC to a patched version, monitoring system activity for signs of exploitation, and restricting network access where possible.

Long-Term Security Practices

Enhancing overall system security through regular updates, security training for personnel, and implementing access controls can reduce the risk of similar vulnerabilities.

Patching and Updates

Regularly checking for updates and applying patches provided by GPAC can effectively mitigate the CVE-2021-29279 vulnerability, ensuring a more secure system environment.