APT didn't enforce signature validation for source packages

It was discovered that APT's crypto-based routines to verify binary package authenticity wasn't being used for source packages.

Impact

• A CVE was assigned
• APT was fixed via a patch
• Discussion followed around further supply chain concerns

Type of compromise

Negligence - Insufficient client-side package authenticity verification

References

• https://ubuntu.com/security/notices/USN-1762-1
• https://nvd.nist.gov/vuln/detail/CVE-2013-1051