/ 
perl-5.27.11
⭐ Starred 2013
/ Net::FTP::dataconn
Security Advisories (7)
CVE-2020-12723 (2020-06-05)

regcomp.c in Perl before 5.30.3 allows a buffer overflow via a crafted regular expression because of recursive S_study_chunk calls.

CVE-2020-10878 (2020-06-05)

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-2020-10543 (2020-06-05)

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-2018-6798 (2018-04-17)

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.

CVE-2023-47100

In Perl before 5.38.2, S_parse_uniprop_string in regcomp.c can write to unallocated space because a property name associated with a \p{...} regular expression construct is mishandled. The earliest affected version is 5.30.0.

CVE-2023-47039 (2023-10-30)

Perl for Windows relies on the system path environment variable to find the shell (cmd.exe). When running an executable which uses Windows Perl interpreter, Perl attempts to find and execute cmd.exe within the operating system. However, due to path search order issues, Perl initially looks for cmd.exe in the current working directory. An attacker with limited privileges can exploit this behavior by placing cmd.exe in locations with weak permissions, such as C:\ProgramData. By doing so, when an administrator attempts to use this executable from these compromised locations, arbitrary code can be executed.

CVE-2025-40909 (2025-05-30)

Perl threads have a working directory race condition where file operations may target unintended paths. If a directory handle is open at thread creation, the process-wide current working directory is temporarily changed in order to clone that handle for the new thread, which is visible from any third (or more) thread already running. This may lead to unintended operations such as loading code or accessing files from unexpected locations, which a local attacker may be able to exploit. The bug was introduced in commit 11a11ecf4bea72b17d250cfb43c897be1341861e and released in Perl version 5.13.6

NAME

Net::FTP::dataconn - FTP Client data connection class

DESCRIPTION

Some of the methods defined in Net::FTP return an object which will be derived from this class. The dataconn class itself is derived from the IO::Socket::INET class, so any normal IO operations can be performed. However the following methods are defined in the dataconn class and IO should be performed using these.

read ( BUFFER, SIZE [, TIMEOUT ] )

Read SIZE bytes of data from the server and place it into BUFFER, also performing any <CRLF> translation necessary. TIMEOUT is optional, if not given, the timeout value from the command connection will be used.

Returns the number of bytes read before any <CRLF> translation.

write ( BUFFER, SIZE [, TIMEOUT ] )

Write SIZE bytes of data from BUFFER to the server, also performing any <CRLF> translation necessary. TIMEOUT is optional, if not given, the timeout value from the command connection will be used.

Returns the number of bytes written before any <CRLF> translation.

bytes_read ()

Returns the number of bytes read so far.

abort ()

Abort the current data transfer.

close ()

Close the data connection and get a response from the FTP server. Returns true if the connection was closed successfully and the first digit of the response from the server was a '2'.