ALINUX2-SA-2021%3A0004

Package updates are available for Alibaba Cloud Linux 2.1903 that fix the following vulnerabilities: CVE-2020-10543: Perl before 5.30.3 on 32-bit platforms allows a heap-based buffer overflow because nested regular expression quantifiers have an integer overflow. CVE-2020-10878: Perl before 5.30.3 has an integer overflow related to mishandling of a "PL_regkind[OP(n)] == NOTHING" situation. A crafted regular expression could lead to malformed bytecode with a possibility of instruction injection. CVE-2020-12723: regcomp.c in Perl before 5.30.3 allows a buffer overflow via a crafted regular expression because of recursive S_study_chunk calls.