Debian — Security Information — DSA-4347-1 perl

Multiple vulnerabilities were discovered in the implementation of the
Perl programming language. The Common Vulnerabilities and Exposures
project identifies the following problems:

• CVE-2018-18311

  Jayakrishna Menon and Christophe Hauser discovered an integer
  overflow vulnerability in Perl_my_setenv leading to a heap-based
  buffer overflow with attacker-controlled input.

• CVE-2018-18312

  Eiichi Tsukata discovered that a crafted regular expression could
  cause a heap-based buffer overflow write during compilation,
  potentially allowing arbitrary code execution.

• CVE-2018-18313

  Eiichi Tsukata discovered that a crafted regular expression could
  cause a heap-based buffer overflow read during compilation which
  leads to information leak.

• CVE-2018-18314

  Jakub Wilk discovered that a specially crafted regular expression
  could lead to a heap-based buffer overflow.

For the stable distribution (stretch), these problems have been fixed in
version 5.24.1-3+deb9u5.

We recommend that you upgrade your perl packages.

For the detailed security status of perl please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/perl