/ 
perl-5.13.2
⭐ Starred 2013
/ VMS::DCLsym
Security Advisories (21)
CVE-2011-2728 (2012-12-21)

The bsd_glob function in the File::Glob module for Perl before 5.14.2 allows context-dependent attackers to cause a denial of service (crash) via a glob expression with the GLOB_ALTDIRFUNC flag, which triggers an uninitialized pointer dereference.

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-2018-6913 (2018-04-17)

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.

CVE-2018-18314 (2018-12-07)

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

CVE-2018-18313 (2018-12-07)

Perl before 5.26.3 has a buffer over-read via a crafted regular expression that triggers disclosure of sensitive information from process memory.

CVE-2018-18312 (2018-12-05)

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.

CVE-2018-18311 (2018-12-07)

Perl before 5.26.3 and 5.28.x before 5.28.1 has a buffer overflow via a crafted regular expression that triggers invalid write operations.

CVE-2015-8853 (2016-05-25)

The (1) S_reghop3, (2) S_reghop4, and (3) S_reghopmaybe3 functions in regexec.c in Perl before 5.24.0 allow context-dependent attackers to cause a denial of service (infinite loop) via crafted utf-8 data, as demonstrated by "a\x80."

CVE-2013-1667 (2013-03-14)

The rehash mechanism in Perl 5.8.2 through 5.16.x allows context-dependent attackers to cause a denial of service (memory consumption and crash) via a crafted hash key.

CVE-2010-4777 (2014-02-10)

The Perl_reg_numbered_buff_fetch function in Perl 5.10.0, 5.12.0, 5.14.0, and other versions, when running with debugging enabled, allows context-dependent attackers to cause a denial of service (assertion failure and application exit) via crafted input that is not properly handled when using certain regular expressions, as demonstrated by causing SpamAssassin and OCSInventory to crash.

CVE-2012-5195 (2012-12-18)

Heap-based buffer overflow in the Perl_repeatcpy function in util.c in Perl 5.12.x before 5.12.5, 5.14.x before 5.14.3, and 5.15.x before 15.15.5 allows context-dependent attackers to cause a denial of service (memory consumption and crash) or possibly execute arbitrary code via the 'x' string repeat operator.

CVE-2016-2381 (2016-04-08)

Perl might allow context-dependent attackers to bypass the taint protection mechanism in a child process via duplicate environment variables in envp.

CVE-2013-7422 (2015-08-16)

Integer underflow in regcomp.c in Perl before 5.20, as used in Apple OS X before 10.10.5 and other products, allows context-dependent attackers to execute arbitrary code or cause a denial of service (application crash) via a long digit string associated with an invalid backreference within a regular expression.

CVE-2011-1487 (2011-04-11)

The (1) lc, (2) lcfirst, (3) uc, and (4) ucfirst functions in Perl 5.10.x, 5.11.x, and 5.12.x through 5.12.3, and 5.13.x through 5.13.11, do not apply the taint attribute to the return value upon processing tainted input, which might allow context-dependent attackers to bypass the taint protection mechanism via a crafted string.

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-2024-56406 (2025-04-13)

A heap buffer overflow vulnerability was discovered in Perl. When there are non-ASCII bytes in the left-hand-side of the `tr` operator, `S_do_trans_invmap` can overflow the destination pointer `d`.    $ perl -e '$_ = "\x{FF}" x 1000000; tr/\xFF/\x{100}/;'    Segmentation fault (core dumped) It is believed that this vulnerability can enable Denial of Service and possibly Code Execution attacks on platforms that lack sufficient defenses.

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-2016-1238 (2016-08-02)

(1) cpan/Archive-Tar/bin/ptar, (2) cpan/Archive-Tar/bin/ptardiff, (3) cpan/Archive-Tar/bin/ptargrep, (4) cpan/CPAN/scripts/cpan, (5) cpan/Digest-SHA/shasum, (6) cpan/Encode/bin/enc2xs, (7) cpan/Encode/bin/encguess, (8) cpan/Encode/bin/piconv, (9) cpan/Encode/bin/ucmlint, (10) cpan/Encode/bin/unidump, (11) cpan/ExtUtils-MakeMaker/bin/instmodsh, (12) cpan/IO-Compress/bin/zipdetails, (13) cpan/JSON-PP/bin/json_pp, (14) cpan/Test-Harness/bin/prove, (15) dist/ExtUtils-ParseXS/lib/ExtUtils/xsubpp, (16) dist/Module-CoreList/corelist, (17) ext/Pod-Html/bin/pod2html, (18) utils/c2ph.PL, (19) utils/h2ph.PL, (20) utils/h2xs.PL, (21) utils/libnetcfg.PL, (22) utils/perlbug.PL, (23) utils/perldoc.PL, (24) utils/perlivp.PL, and (25) utils/splain.PL in Perl 5.x before 5.22.3-RC2 and 5.24 before 5.24.1-RC2 do not properly remove . (period) characters from the end of the includes directory array, which might allow local users to gain privileges via a Trojan horse module under the current working directory.

CVE-2015-8608 (2017-02-07)

The VDir::MapPathA and VDir::MapPathW functions in Perl 5.22 allow remote attackers to cause a denial of service (out-of-bounds read) and possibly execute arbitrary code via a crafted (1) drive letter or (2) pInName argument.

NAME

VMS::DCLsym - Perl extension to manipulate DCL symbols

SYNOPSIS

tie %allsyms, VMS::DCLsym;
tie %cgisyms, VMS::DCLsym, 'GLOBAL';


$handle = new VMS::DCLsym;
$value = $handle->getsym($name);
$handle->setsym($name,$value,'GLOBAL') or die "Can't create symbol: $!\n";
$handle->delsym($name,'LOCAL') or die "Can't delete symbol: $!\n";
$handle->clearcache();

DESCRIPTION

The VMS::DCLsym extension provides access to DCL symbols using a tied hash interface. This allows Perl scripts to manipulate symbols in a manner similar to the way in which logical names are manipulated via the built-in %ENV hash. Alternatively, one can call methods in this package directly to read, create, and delete symbols.

Tied hash interface

This interface lets you treat the DCL symbol table as a Perl associative array, in which the key of each element is the symbol name, and the value of the element is that symbol's value. Case is not significant in the key string, as DCL converts symbol names to uppercase, but it is significant in the value string. All of the usual operations on associative arrays are supported. Reading an element retrieves the current value of the symbol, assigning to it defines a new symbol (or overwrites the old value of an existing symbol), and deleting an element deletes the corresponding symbol. Setting an element to undef, or undefing it directly, sets the corresponding symbol to the null string. You may also read the special keys ':GLOBAL' and ':LOCAL' to find out whether a default symbol table has been specified for this hash (see table below), or set either or these keys to specify a default symbol table.

When you call the tie function to bind an associative array to this package, you may specify as an optional argument the symbol table in which you wish to create and delete symbols. If the argument is the string 'GLOBAL', then the global symbol table is used; any other string causes the local symbol table to be used. Note that this argument does not affect attempts to read symbols; if a symbol with the specified name exists in the local symbol table, it is always returned in preference to a symbol by the same name in the global symbol table.

Object interface

Although it's less convenient in some ways than the tied hash interface, you can also call methods directly to manipulate individual symbols. In some cases, this allows you finer control than using a tied hash aggregate. The following methods are supported:

new

This creates a VMS::DCLsym object which can be used as a handle for later method calls. The single optional argument specifies the symbol table used by default in future method calls, in the same way as the optional argument to tie described above.

getsym

If called in a scalar context, getsym returns the value of the symbol whose name is given as the argument to the call, or undef if no such symbol exists. Symbols in the local symbol table are always used in preference to symbols in the global symbol table. If called in a list context, getsym returns a two-element list, whose first element is the value of the symbol, and whose second element is the string 'GLOBAL' or 'LOCAL', indicating the table from which the symbol's value was read.

setsym

The first two arguments taken by this method are the name of the symbol and the value which should be assigned to it. The optional third argument is a string specifying the symbol table to be used; 'GLOBAL' specifies the global symbol table, and any other string specifies the local symbol table. If this argument is omitted, the default symbol table for the object is used. setsym returns TRUE if successful, and FALSE otherwise.

delsym

This method deletes the symbol whose name is given as the first argument. The optional second argument specifies the symbol table, as described above under setsym. It returns TRUE if the symbol was successfully deleted, and FALSE if it was not.

clearcache

Because of the overhead associated with obtaining the list of defined symbols for the tied hash iterator, it is only done once, and the list is reused for subsequent iterations. Changes to symbols made through this package are recorded, but in the rare event that someone changes the process' symbol table from outside (as is possible using some software from the net), the iterator will be out of sync with the symbol table. If you expect this to happen, you can reset the cache by calling this method. In addition, if you pass a FALSE value as the first argument, caching will be disabled. It can be re-enabled later by calling clearcache again with a TRUE value as the first argument. It returns TRUE or FALSE to indicate whether caching was previously enabled or disabled, respectively.

This method is a stopgap until we can incorporate code into this extension to traverse the process' symbol table directly, so it may disappear in a future version of this package.

AUTHOR

Charles Bailey bailey@newman.upenn.edu

VERSION

1.01 08-Dec-1996

BUGS

The list of symbols for the iterator is assembled by spawning off a subprocess, which can be slow. Ideally, we should just traverse the process' symbol table directly from C.