Eval injection vulnerability in scripts/uscan.pl before Rev 1984 in devscripts allows remote attackers to execute arbitrary Perl code via crafted pathnames on distribution servers for upstream source code used in Debian GNU/Linux packages.

It was discovered that uscan, a tool to scan/watch upstream sources for new releases of software, included in devscripts (a collection of scripts to make the life of a Debian Package maintainer easier), skips OpenPGP verification if the upstream source is already downloaded from a previous run even if the verification failed back then.

scripts/grep-excuses.pl in Debian devscripts through 2.18.3 allows code execution through unsafe YAML loading because YAML::Syck is used without a configuration that prevents unintended blessing.

An issue exists in uscan in devscripts before 2.13.19, which could let a remote malicious user execute arbitrary code via a crafted tarball.