CVE-2019-12802 : Vulnerability Insights and Analysis

Radare2 through version 3.5.1 is vulnerable to a denial of service attack due to mishandling context changes in the rcc_context function of libr/egg/egg_lang.c. Attackers can exploit this vulnerability to crash the application and potentially cause other impacts like invalid memory access or invalid free.

Understanding CVE-2019-12802

This CVE involves a vulnerability in the rcc_context function of radare2, potentially leading to a denial of service attack.

What is CVE-2019-12802?

In radare2 up to version 3.5.1, the rcc_context function in libr/egg/egg_lang.c does not handle context modifications correctly. This flaw allows malicious actors to exploit the vulnerability, resulting in a denial of service by crashing the application. Additionally, attackers may trigger other consequences such as invalid memory access in r_egg_lang_parsechar or invalid free in rcc_pusharg.

The Impact of CVE-2019-12802

The vulnerability in CVE-2019-12802 can have the following impacts:

Remote attackers can cause a denial of service by crashing the application.
There may be unspecified consequences such as invalid memory access or invalid free.

Technical Details of CVE-2019-12802

This section provides technical details about the vulnerability.

Vulnerability Description

The vulnerability in CVE-2019-12802 arises from the mishandling of context changes in the rcc_context function of radare2, potentially leading to a denial of service attack.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

The vulnerability can be exploited by malicious actors to trigger a denial of service attack by crashing the application. Additionally, attackers may exploit the flaw to cause other impacts like invalid memory access or invalid free.

Mitigation and Prevention

Protecting systems from CVE-2019-12802 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update radare2 to the latest version to patch the vulnerability.
Monitor for any unusual application crashes or memory access issues.

Long-Term Security Practices

Regularly update software and libraries to mitigate known vulnerabilities.
Implement proper input validation and error handling mechanisms in applications.

Patching and Updates

Ensure timely patching of radare2 to the latest version to address the vulnerability.