Astra Linux – Vulnerability in libsereal-decoder-perl

In versions of Sereal::Decoder prior to 5.005 for Perl, heap out-of-bounds reading was possible through crafted input. In the Perl/Decoder/srldecoder.c file, the functions srlreadobject and srlreadhash process a COPY tag—a back-reference whose target byte is re-decoded by the decoder as a new tag...