Perl before 5.26.3 and 5.28.0 before 5.28.1 has a buffer overflow via a crafted regular expression that triggers invalid write operations.

mod_perl 2.0 through 2.0.10 allows attackers to execute arbitrary Perl code by placing it in a user-owned .htaccess file, because (contrary to the documentation) there is no configuration option that permits Perl code for the administrator's control of HTTP request processing without also permitting unprivileged users to run Perl code in the context of the user account that runs Apache HTTP Server processes.

perl-archive-zip is vulnerable to a directory traversal in Archive::Zip. It was found that the Archive::Zip module did not properly sanitize paths while extracting zip files. An attacker able to provide a specially crafted archive for processing could use this flaw to write or overwrite arbitrary files in the context of the perl interpreter.

The parse() method in the Email::Address module through 1.909 for Perl is vulnerable to Algorithmic complexity on specially prepared input, leading to Denial of Service. Prepared special input that caused this problem contained 30 form-field characters ("\f").

The PGObject::Util::DBAdmin module before 0.120.0 for Perl, as used in LedgerSMB through 1.5.x, insufficiently sanitizes or escapes variable values used as part of shell command execution, resulting in shell code injection via the create(), run_file(), backup(), or restore() function. The vulnerability allows unauthorized users to execute code with the same privileges as the running application.

In Perl through 5.26.2, the Archive::Tar module allows remote attackers to bypass a directory-traversal protection mechanism, and overwrite arbitrary files, via an archive file containing a symlink and a regular file with the same name.

Multiple XML external entity (XXE) vulnerabilities in the (1) CCRC WAN Server / CM Server, (2) Perl CC/CQ integration trigger scripts, (3) CMAPI Java interface, (4) ClearCase remote client, and (5) CMI and OSLC-based ClearQuest integrations components in IBM Rational ClearCase 7.1.0.x, 7.1.1.x, 7.1.2 through 7.1.2.13, 8.0 through 8.0.0.10, and 8.0.1 through 8.0.1.3 allow remote attackers to cause a denial of service or access other servers via crafted XML data. IBM X-Force ID: 92263.

An issue was discovered in Perl 5.22 through 5.26. Matching a crafted locale dependent regular expression can cause a heap-based buffer over-read and potentially information disclosure.

Heap-based buffer overflow in the pack function in Perl before 5.26.2 allows context-dependent attackers to execute arbitrary code via a large item count.

An issue was discovered in Perl 5.18 through 5.26. A crafted regular expression can cause a heap-based buffer overflow, with control over the bytes written.