libksba - Integer Underflow Heap-based Buffer Overflow
Summary
DSA-3078-1: libksba - security update. Affects libksba versions < 1.2.0-2+deb7u1. Fixed in 1.2.0-2+deb7u1. How to fix ↓
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Background
libksba is an X.509 and CMS (PKCS#7) library used for handling cryptographic operations. It provides functions for parsing and manipulating certificates, keys, and other cryptographic data. The library is commonly used by applications that require X.509 and CMS support. However, a vulnerability has been discovered in libksba that could allow an attacker to execute arbitrary code or cause a denial of service.
Vulnerability Detail
The vulnerability in libksba is an integer underflow flaw that leads to a heap-based buffer overflow. Specifically, the ksba_oid_to_str() function is affected. By exploiting this flaw, an attacker can craft special S/MIME messages or ECC-based OpenPGP data to trigger the buffer overflow. This could result in a crash of the application using libksba or potentially allow the execution of arbitrary code. The impact of this vulnerability depends on the context in which libksba is used and the privileges of the affected application.
How To Fix
Minimum fixed version
1.2.0-2+deb7u1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade libksbaTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is essential to apply the provided fix by upgrading the libksba package to the patched version.
Conclusion
The libksba library is vulnerable to an integer underflow heap-based buffer overflow. This vulnerability can be exploited to crash the application using libksba or potentially execute arbitrary code. To mitigate this issue, it is recommended to upgrade the libksba package to the patched version. For further assistance or support in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for libksba →
FAQ
libksba is an X.509 and CMS (PKCS#7) library used for handling cryptographic operations.
The impact of this vulnerability depends on the context in which libksba is used and the privileges of the affected application. It could result in a crash of the application or allow the execution of arbitrary code.
To fix this vulnerability, upgrade the libksba package to the patched version provided.
There is no known workaround for this vulnerability. It is crucial to apply the provided fix by upgrading the libksba package.
For more information about this vulnerability, you can refer to the DSA-3078-1 advisory on the Debian Security Tracker website.
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