CVE-2019-5747 : Vulnerability Insights and Analysis
Learn about CVE-2019-5747, a vulnerability in BusyBox version 1.30.0 that allows remote attackers to extract sensitive information by sending crafted DHCP messages. Find out how to mitigate this security risk.
CVE-2019-5747 was published on January 9, 2019, and involves a vulnerability in BusyBox version 1.30.0. This vulnerability allows a remote attacker to extract sensitive information by sending a specially crafted DHCP message.
Understanding CVE-2019-5747
This CVE identifies an out-of-bounds read vulnerability in the udhcp components of BusyBox, potentially leading to information leakage.
What is CVE-2019-5747?
The vulnerability in BusyBox version 1.30.0 allows a remote attacker to extract sensitive information from the stack by sending a specifically crafted DHCP message. It is related to improper verification of a 4-byte length during the decoding of DHCP_SUBNET.
The Impact of CVE-2019-5747
The vulnerability could potentially allow a remote attacker to extract sensitive information from the stack by sending a specifically crafted DHCP message. This could lead to unauthorized access to sensitive data.
Technical Details of CVE-2019-5747
CVE-2019-5747 involves the following technical aspects:
Vulnerability Description
An out-of-bounds read in udhcp components of BusyBox could allow a remote attacker to leak sensitive information from the stack by sending a crafted DHCP message.
Affected Systems and Versions
- Product: n/a
- Vendor: n/a
- Version: 1.30.0
Exploitation Mechanism
The vulnerability is exploited by sending a specially crafted DHCP message to the affected system, triggering the out-of-bounds read in the udhcp components.
Mitigation and Prevention
To address CVE-2019-5747, consider the following mitigation strategies:
Immediate Steps to Take
- Apply patches or updates provided by the vendor.
- Monitor network traffic for any signs of exploitation.
Long-Term Security Practices
- Regularly update software and firmware to the latest versions.
- Implement network segmentation to limit the impact of potential attacks.
Patching and Updates
Ensure that the affected systems are updated with the latest patches and security fixes to mitigate the vulnerability.