Perl - Environment Handling Bug
Summary
DSA-3501-1: perl - security update. Affects perl versions < 5.14.2-21+deb7u3. Fixed in 5.14.2-21+deb7u3. How to fix ↓
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Background
Perl is a popular programming language known for its powerful text processing capabilities and extensive module ecosystem. It is widely used for various purposes, including web development, system administration, and data manipulation. However, a vulnerability has been discovered in Perl's environment handling, which could lead to the propagation of environment variables to subprocesses despite the supposed protections offered by taint checking.
Vulnerability Detail
The vulnerability in Perl's environment handling arises from a bug in the way the %ENV hash variable is populated. When multiple environment variables with the same name appear in the envp, only the last value would be stored in %ENV, while the getenv function would return the first value. This inconsistency could result in an ambiguous environment, bypassing the taint security mechanism applied to %ENV. As a consequence, environment variables could be propagated to subprocesses, potentially leading to unauthorized access or other security issues.
How To Fix
Minimum fixed version
5.14.2-21+deb7u3
This is the first release that contains the fix.
sudo apt-get install --only-upgrade perlTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The Perl environment handling bug could potentially lead to the propagation of environment variables to subprocesses, bypassing taint checking. It is crucial to upgrade the Perl packages to the fixed versions mentioned in the 'how_to_fix' section to mitigate this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
See every vulnerability recorded for perl →
FAQ
Perl is a programming language known for its text processing capabilities and extensive module ecosystem.
The vulnerability could allow environment variables to be propagated to subprocesses, potentially leading to unauthorized access or other security issues.
To fix this vulnerability, upgrade the Perl packages to the fixed versions mentioned in the 'how_to_fix' section.
No, only specific versions are affected. Please refer to the 'affected' section for more details.
No specific workaround has been mentioned for this vulnerability.
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