CVE-2017-7854 : Exploit Details and Defense Strategies

Radare2 1.3.0's wasm.c file contains a vulnerability that could lead to a denial of service attack when processing a specially crafted Web Assembly file.

Understanding CVE-2017-7854

This CVE entry describes a specific vulnerability in Radare2 version 1.3.0 that could be exploited remotely to cause a denial of service through a heap-based buffer over-read.

What is CVE-2017-7854?

The consume_init_expr function in wasm.c within Radare2 1.3.0 is susceptible to a remote denial of service attack. By sending a maliciously crafted Web Assembly file, an attacker could trigger a heap-based buffer over-read, resulting in a crash of the application.

The Impact of CVE-2017-7854

The vulnerability could allow an attacker to remotely crash the application by exploiting the heap-based buffer over-read, potentially disrupting the availability of the affected system.

Technical Details of CVE-2017-7854

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The consume_init_expr function in wasm.c of Radare2 1.3.0 enables remote attackers to execute a denial of service attack by causing a heap-based buffer over-read, leading to an application crash.

Affected Systems and Versions

Product: Radare2
Vendor: N/A
Version: 1.3.0

Exploitation Mechanism

The vulnerability can be exploited by sending a specifically crafted Web Assembly file to the target system, triggering the heap-based buffer over-read and resulting in a crash.

Mitigation and Prevention

To address CVE-2017-7854, consider the following mitigation strategies:

Immediate Steps to Take

Apply the latest patches or updates provided by Radare2 to fix the vulnerability.
Avoid opening untrusted Web Assembly files to prevent potential attacks.

Long-Term Security Practices

Regularly update and patch software to protect against known vulnerabilities.
Implement network security measures to detect and block malicious traffic targeting the vulnerability.

Patching and Updates

Ensure that Radare2 is kept up to date with the latest security patches to mitigate the risk of exploitation.