Vulnerability in dropbear - security update
Summary
DLA-634-1: dropbear - security update. Affects dropbear versions < 2012.55-1.3+deb7u1. Fixed in 2012.55-1.3+deb7u1. How to fix ↓
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Background
Dropbear is a lightweight SSH2 server and client used for secure remote login and file transfer. It is designed to be small yet fully functional, making it suitable for embedded systems and low-resource environments. However, a security vulnerability has been discovered in dropbear that could potentially compromise the integrity and confidentiality of SSH connections.
Vulnerability Detail
The vulnerability, identified as CVE-2016-7406 and CVE-2016-7407, consists of two issues in dropbear:
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CVE-2016-7406: This vulnerability relates to potential issues in exit message formatting. Attackers could exploit this flaw to manipulate or forge exit messages, potentially leading to unauthorized access or denial of service.
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CVE-2016-7407: This vulnerability involves overflows when parsing OpenSSH's ASN.1 key format. By crafting a malicious key, an attacker could trigger buffer overflows, potentially resulting in remote code execution or system compromise.
How To Fix
Minimum fixed version
2012.55-1.3+deb7u1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade dropbearTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
No known workarounds are available for these vulnerabilities. It is crucial to apply the recommended fix by upgrading the dropbear package to the patched version.
Conclusion
It is essential to promptly address these vulnerabilities in dropbear to ensure the security and integrity of SSH connections. By upgrading to the patched version, you can mitigate the risks associated with potential unauthorized access, denial of service, remote code execution, and system compromise. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for dropbear →
FAQ
Dropbear is a lightweight SSH2 server and client used for secure remote login and file transfer. It is designed to be small yet fully functional, making it suitable for embedded systems and low-resource environments.
The vulnerabilities could allow attackers to manipulate or forge exit messages, potentially leading to unauthorized access or denial of service. Additionally, the buffer overflows in ASN.1 key parsing could result in remote code execution or system compromise.
To fix these vulnerabilities, you should upgrade your dropbear packages to version 2012.55-1.3+deb7u1 or later. Please refer to the 'how_to_fix' section for detailed instructions.
No known workarounds are available for these vulnerabilities. It is crucial to apply the recommended fix by upgrading the dropbear package to the patched version.
You can find more information about these vulnerabilities in the CVE-2016-7406 and CVE-2016-7407 entries on the Debian Security Tracker website.
Related vulnerabilities
Recent vulnerabilities recorded for dropbear.
