OpenSSL - One-byte Buffer Overread Vulnerability
Summary
DLA-1157-1: openssl - security update. Affects openssl versions < 1.0.1t-1+deb7u3. Fixed in 1.0.1t-1+deb7u3. How to fix ↓
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Background
OpenSSL is a widely used open-source library that provides cryptographic functionality to applications. It is commonly used for secure communication over the internet, such as in HTTPS connections. The library supports various protocols and algorithms for encryption, decryption, and authentication. However, a vulnerability has been discovered in OpenSSL that could potentially lead to a one-byte buffer overread while parsing a malformed IPAddressFamily extension in an X.509 certificate.
Vulnerability Detail
The vulnerability, identified as CVE-2017-3735, arises from a flaw in the parsing of the IPAddressFamily extension in X.509 certificates. When OpenSSL encounters a malformed extension, it may read one byte beyond the intended buffer, resulting in a buffer overread. This issue could potentially be exploited by an attacker to obtain sensitive information from the memory of an affected system. The impact of this vulnerability depends on the context in which OpenSSL is used and the sensitivity of the data being processed.
How To Fix
Minimum fixed version
1.0.1t-1+deb7u3
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
There is no specific workaround mentioned in the advisory. The recommended course of action is to apply the security update as soon as possible.
Conclusion
The OpenSSL library is prone to a one-byte buffer overread vulnerability when parsing a malformed IPAddressFamily extension in X.509 certificates. This vulnerability could potentially be exploited to obtain sensitive information from the memory of an affected system. It is crucial to upgrade the OpenSSL package to the patched version to mitigate this risk. For further assistance or support in addressing this vulnerability, you can reach out to DevNack.com.
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FAQ
OpenSSL is an open-source library that provides cryptographic functions and protocols for secure communication over the internet.
The vulnerability could potentially allow an attacker to read sensitive information from the memory of an affected system.
To fix this vulnerability, you should upgrade the OpenSSL package to version 1.0.1t-1+deb7u3 or later.
No, only versions prior to 1.0.1t-1+deb7u3 are affected. It is recommended to check the version installed on your system and apply the necessary update.
You can find more information about this vulnerability in the upstream advisory at https://www.openssl.org/news/secadv/20170828.txt
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