OpenSSL - Security Update (DLA-637-1)
Summary
DLA-637-1: openssl - security update. Affects openssl versions < 1.0.1t-1+deb7u1. Fixed in 1.0.1t-1+deb7u1. How to fix ↓
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Background
OpenSSL is an open-source software library that provides cryptographic functions to secure communications over computer networks. It is widely used to implement secure communication protocols such as HTTPS, TLS, and SSL. The OpenSSL library is utilized by various applications and services to ensure the confidentiality, integrity, and authenticity of data transmitted over the network. However, several vulnerabilities have been discovered in OpenSSL, which could potentially lead to security breaches and compromise the confidentiality of sensitive information.
Vulnerability Detail
The following vulnerabilities have been identified in OpenSSL:
- CVE-2016-2177: OpenSSL uses undefined pointer arithmetic, which can result in unexpected behavior and potential security vulnerabilities.
- CVE-2016-2178: A timing leak in the DSA code of OpenSSL can be exploited to extract sensitive information.
- CVE-2016-2179 / CVE-2016-2181: Denial of service vulnerabilities in DTLS (Datagram Transport Layer Security) can be triggered, leading to service disruption.
- CVE-2016-2180 / CVE-2016-2182 / CVE-2016-6303: Out-of-bounds memory read and write vulnerabilities have been discovered in various OpenSSL functions, potentially allowing an attacker to execute arbitrary code or crash the application.
- CVE-2016-2183: DES-based cipher suites are demoted from the HIGH group to MEDIUM as a mitigation for the SWEET32 attack.
- CVE-2016-6302: The use of SHA512 in TLS session tickets is susceptible to denial of service attacks.
- CVE-2016-6304: Excessively large OCSP (Online Certificate Status Protocol) status requests can cause denial of service via memory exhaustion.
- CVE-2016-6306: Missing message length validation when parsing certificates may result in denial of service.
These vulnerabilities pose a significant risk to the security and stability of systems utilizing OpenSSL.
How To Fix
Minimum fixed version
1.0.1t-1+deb7u1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade opensslTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
No specific workarounds have been mentioned for these vulnerabilities. It is essential to apply the recommended updates to mitigate the risks effectively.
Conclusion
OpenSSL is a critical component for securing network communications, and the discovered vulnerabilities pose significant risks to the confidentiality, integrity, and availability of systems utilizing OpenSSL. It is crucial to promptly apply the recommended updates to ensure the security of your system. For further support and assistance with vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for openssl →
FAQ
OpenSSL is an open-source software library that provides cryptographic functions to secure communications over computer networks. It is widely used to implement secure communication protocols such as HTTPS, TLS, and SSL.
These vulnerabilities can lead to security breaches, unauthorized access to sensitive information, denial of service attacks, and potential execution of arbitrary code.
To fix these vulnerabilities, it is recommended to upgrade the openssl and libssl1.0.0 packages to version 1.0.1t-1+deb7u1 or later. Follow the official instructions provided by Debian LTS for the upgrade process.
No specific workarounds have been mentioned for these vulnerabilities. It is crucial to apply the recommended updates to mitigate the risks effectively.
You can find further information about Debian LTS security advisories, including how to apply updates and frequently asked questions, on the Debian LTS wiki.
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