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USN-5230-1: App::cpanminus vulnerability

24 January 2022

App::cpanminus could be made to bypass signature verification if it received specially crafted input.

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Releases

Packages

  • cpanminus - script to get, unpack, build and install modules from CPAN

Details

It was discovered that App::cpanminus did not properly verify CHECKSUMS files.
An attacker could possibly use this issue to bypass signature verification,
gaining access to sensitive data or possibly executing unauthorized code.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

After a standard system update, configure App::cpanminus to use only trusted
CPAN mirrors over HTTPS using the option on the command line or
environment variable.

References

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Further reading