Bug#905603: libapache2-mod-perl2: crash when using EV::signal 'CHLD' and backtick operator at the same time
Benoit Bolsee
purak at hurify1.com
Tue Aug 7 00:03:55 BST 2018
Package: libapache2-mod-perl2
Version: 2.0.10-2
Severity: important
Tags: patch upstream
-- Package-specific info:
-------------8<---------- Start Bug Report ------------8<----------
1. Problem Description:
To reproduce the problem, start from a vanilla Debian server (I used 9.5).
Install apache2, libapache2-mod-perl2, libev-perl
Create 2 perl files with following content:
handler1.pl:
#!/usr/bin/perl
my $pwd = `/bin/pwd`;
1;
handler2.pl:
#!/usr/bin/perl
use EV;
my $w = EV::signal 'CHLD', sub {
print "SIGCHLD received\n";
};
1;
Reference them in two PerlRequire directive, either in /etc/apache2/apache2.conf or in a separate conf file in /etc/apache2/conf-enabled:
# order is important
PerlRequire "/path/to/handler1.pl"
PerlRequire "/path/to/handler2.pl"
Apache will crash on startup.
===============================
I did an in-depth analysis of this bug. What happens is the following:
The backtick operator in handler1.pl internally calls waitpid, which internally waits for the SIGCHLD signal.
EV::signal 'CHLD' installs a signal handler using sigaction (see libev-perl-4.22: libev/ev.c::ev_signal_start). There is no provision to remove this signal handler. The handler is located in EV.so, loaded by the XS loader.
apache2 goes through 3 stages on startup: pre-config, destroy-config, create-config
In the pre-config stage, the 2 PerlRequire commands are executed and the signal handler is installed at process level.
In the destroy-config stage, all modules are removed, including mod_perl, which consists in removing all XS modules (see libapache2-mod-perl2-2.0.10: src/modules/perl/modperl_interp.c::modperl_interp_destroy())
At this point the signal handler is still registered at process level but points to invalid memory!
In the create-config stage, the config is recreated, handler1.pl is reloaded and the backtick operator triggers a SIGCHLD, which causes a SIGEV because the signal handler is not in memory (the EV.so library will only be loaded when the second PerlRequire is executed).
================================
I came to the conclusion that unloading the XS modules when mod_perl is unloaded is very harsh; the perl interpretor is clearly not designed for that. I tested a patch where the unloading of XS modules is simply skipped. It's working and it also fixes another bug that I will report separately:
--- a/src/modules/perl/modperl_interp.c 2018-08-03 20:49:54.000000000 +0200
+++ b/src/modules/perl/modperl_interp.c 2018-08-03 20:49:54.000000000 +0200
@@ -122,11 +122,11 @@
MP_TRACE_i(MP_FUNC, "*error - still in use!*");
}
- handles = modperl_xs_dl_handles_get(aTHX);
+ /*handles = modperl_xs_dl_handles_get(aTHX);*/
modperl_perl_destruct(interp->perl);
- modperl_xs_dl_handles_close(handles);
+ /*modperl_xs_dl_handles_close(handles);*/
free(interp);
}
2. Used Components and their Configuration:
*** mod_perl version 2.000010
*** using /usr/lib/x86_64-linux-gnu/perl5/5.24/Apache2/BuildConfig.pm
*** Makefile.PL options:
MP_APR_CONFIG => /usr/bin/apr-config
MP_APR_LIB => aprext
MP_APXS => /usr/bin/apxs
MP_CCOPTS => -g -O2 -fdebug-prefix-map=/build/libapache2-mod-perl2-go9ZTa/libapache2-mod-perl2-2.0.10=. -fstack-protector-strong -Wformat -Werror=format-security -Wall -fgnu89-inline
MP_COMPAT_1X => 1
MP_GENERATE_XS => 1
MP_LIBNAME => mod_perl
MP_TRACE => 0
MP_USE_DSO => 1
MP_USE_STATIC => 0
*** The httpd binary was not found
*** (apr|apu)-config linking info
-L/usr/lib/x86_64-linux-gnu -laprutil-1
-L/usr/lib/x86_64-linux-gnu -lapr-1
*** /usr/bin/perl -V
Summary of my perl5 (revision 5 version 24 subversion 1) configuration:
Platform:
osname=linux, osvers=3.16.0, archname=x86_64-linux-gnu-thread-multi
uname='linux localhost 3.16.0 #1 smp debian 3.16.0 x86_64 gnulinux '
config_args='-Dusethreads -Duselargefiles -Dcc=x86_64-linux-gnu-gcc -Dcpp=x86_64-linux-gnu-cpp -Dld=x86_64-linux-gnu-gcc -Dccflags=-DDEBIAN -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -fdebug-prefix-map=/build/perl-N8J5tr/perl-5.24.1=. -fstack-protector-strong -Wformat -Werror=format-security -Dldflags= -Wl,-z,relro -Dlddlflags=-shared -Wl,-z,relro -Dcccdlflags=-fPIC -Darchname=x86_64-linux-gnu -Dprefix=/usr -Dprivlib=/usr/share/perl/5.24 -Darchlib=/usr/lib/x86_64-linux-gnu/perl/5.24 -Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5 -Dvendorarch=/usr/lib/x86_64-linux-gnu/perl5/5.24 -Dsiteprefix=/usr/local -Dsitelib=/usr/local/share/perl/5.24.1 -Dsitearch=/usr/local/lib/x86_64-linux-gnu/perl/5.24.1 -Dman1dir=/usr/share/man/man1 -Dman3dir=/usr/share/man/man3 -Dsiteman1dir=/usr/local/man/man1 -Dsiteman3dir=/usr/local/man/man3 -Dusesitecustomize -Duse64bitint -Dman1ext=1 -Dman3ext=3perl -Dpager=/usr/bin/sensible-pager -Uafs -Ud_csh -Ud_ualarm -Uusesfio -Uusenm -Ui_libutil -Uversiononly -DDEBUGGING=-g -Doptimize=-O2 -dEs -Duseshrplib -Dlibperl=libperl.so.5.24.1'
hint=recommended, useposix=true, d_sigaction=define
useithreads=define, usemultiplicity=define
use64bitint=define, use64bitall=define, uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='x86_64-linux-gnu-gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fwrapv -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2 -g',
cppflags='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fwrapv -fno-strict-aliasing -pipe -I/usr/local/include'
ccversion='', gccversion='6.3.0 20170516', gccosandvers=''
intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678, doublekind=3
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16, longdblkind=3
ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
alignbytes=8, prototype=define
Linker and Libraries:
ld='x86_64-linux-gnu-gcc', ldflags =' -fstack-protector-strong -L/usr/local/lib'
libpth=/usr/local/lib /usr/lib/gcc/x86_64-linux-gnu/6/include-fixed /usr/include/x86_64-linux-gnu /usr/lib /lib/x86_64-linux-gnu /lib/../lib /usr/lib/x86_64-linux-gnu /usr/lib/../lib /lib
libs=-lgdbm -lgdbm_compat -ldb -ldl -lm -lpthread -lc -lcrypt
perllibs=-ldl -lm -lpthread -lc -lcrypt
libc=libc-2.24.so, so=so, useshrplib=true, libperl=libperl.so.5.24
gnulibc_version='2.24'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib -fstack-protector-strong'
Characteristics of this binary (from libperl):
Compile-time options: HAS_TIMES MULTIPLICITY PERLIO_LAYERS
PERL_COPY_ON_WRITE PERL_DONT_CREATE_GVSV
PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
PERL_IMPLICIT_CONTEXT PERL_MALLOC_WRAP
PERL_PRESERVE_IVUV USE_64_BIT_ALL USE_64_BIT_INT
USE_ITHREADS USE_LARGE_FILES USE_LOCALE
USE_LOCALE_COLLATE USE_LOCALE_CTYPE
USE_LOCALE_NUMERIC USE_LOCALE_TIME USE_PERLIO
USE_PERL_ATOF USE_REENTRANT_API USE_SITECUSTOMIZE
Locally applied patches:
DEBPKG:debian/cpan_definstalldirs - Provide a sensible INSTALLDIRS default for modules installed from CPAN.
DEBPKG:debian/db_file_ver - https://bugs.debian.org/340047 Remove overly restrictive DB_File version check.
DEBPKG:debian/doc_info - Replace generic man(1) instructions with Debian-specific information.
DEBPKG:debian/enc2xs_inc - https://bugs.debian.org/290336 Tweak enc2xs to follow symlinks and ignore missing @INC directories.
DEBPKG:debian/errno_ver - https://bugs.debian.org/343351 Remove Errno version check due to upgrade problems with long-running processes.
DEBPKG:debian/libperl_embed_doc - https://bugs.debian.org/186778 Note that libperl-dev package is required for embedded linking
DEBPKG:fixes/respect_umask - Respect umask during installation
DEBPKG:debian/writable_site_dirs - Set umask approproately for site install directories
DEBPKG:debian/extutils_set_libperl_path - EU:MM: set location of libperl.a under /usr/lib
DEBPKG:debian/no_packlist_perllocal - Don't install .packlist or perllocal.pod for perl or vendor
DEBPKG:debian/fakeroot - Postpone LD_LIBRARY_PATH evaluation to the binary targets.
DEBPKG:debian/instmodsh_doc - Debian policy doesn't install .packlist files for core or vendor.
DEBPKG:debian/ld_run_path - Remove standard libs from LD_RUN_PATH as per Debian policy.
DEBPKG:debian/libnet_config_path - Set location of libnet.cfg to /etc/perl/Net as /usr may not be writable.
DEBPKG:debian/mod_paths - Tweak @INC ordering for Debian
DEBPKG:debian/prune_libs - https://bugs.debian.org/128355 Prune the list of libraries wanted to what we actually need.
DEBPKG:fixes/net_smtp_docs - [rt.cpan.org #36038] https://bugs.debian.org/100195 Document the Net::SMTP 'Port' option
DEBPKG:debian/perlivp - https://bugs.debian.org/510895 Make perlivp skip include directories in /usr/local
DEBPKG:debian/deprecate-with-apt - https://bugs.debian.org/747628 Point users to Debian packages of deprecated core modules
DEBPKG:debian/squelch-locale-warnings - https://bugs.debian.org/508764 Squelch locale warnings in Debian package maintainer scripts
DEBPKG:debian/skip-upstream-git-tests - Skip tests specific to the upstream Git repository
DEBPKG:debian/patchlevel - https://bugs.debian.org/567489 List packaged patches for 5.24.1-3+deb9u4 in patchlevel.h
DEBPKG:debian/skip-kfreebsd-crash - https://bugs.debian.org/628493 [perl #96272] Skip a crashing test case in t/op/threads.t on GNU/kFreeBSD
DEBPKG:fixes/document_makemaker_ccflags - https://bugs.debian.org/628522 [rt.cpan.org #68613] Document that CCFLAGS should include $Config{ccflags}
DEBPKG:debian/find_html2text - https://bugs.debian.org/640479 Configure CPAN::Distribution with correct name of html2text
DEBPKG:debian/perl5db-x-terminal-emulator.patch - https://bugs.debian.org/668490 Invoke x-terminal-emulator rather than xterm in perl5db.pl
DEBPKG:debian/cpan-missing-site-dirs - https://bugs.debian.org/688842 Fix CPAN::FirstTime defaults with nonexisting site dirs if a parent is writable
DEBPKG:fixes/memoize_storable_nstore - [rt.cpan.org #77790] https://bugs.debian.org/587650 Memoize::Storable: respect 'nstore' option not respected
DEBPKG:debian/regen-skip - Skip a regeneration check in unrelated git repositories
DEBPKG:debian/makemaker-pasthru - https://bugs.debian.org/758471 Pass LD settings through to subdirectories
DEBPKG:debian/makemaker-manext - https://bugs.debian.org/247370 Make EU::MakeMaker honour MANnEXT settings in generated manpage headers
DEBPKG:debian/devel-ppport-reproducibility - https://bugs.debian.org/801523 Sort the list of XS code files when generating RealPPPort.xs
DEBPKG:debian/encode-unicode-bom-doc - https://bugs.debian.org/798727 Document Debian backport of Encode::Unicode fix
DEBPKG:debian/kfreebsd-softupdates - https://bugs.debian.org/796798 Work around Debian Bug#796798
DEBPKG:fixes/autodie-scope - https://bugs.debian.org/798096 Fix a scoping issue with "no autodie" and the "system" sub
DEBPKG:fixes/crosscompile-no-targethost - [23695c0] [perl #127234] Fix the Configure escape with usecrosscompile but no targethost
DEBPKG:fixes/memoize-pod - [rt.cpan.org #89441] Fix POD errors in Memoize
DEBPKG:fixes/ok-pod - Added encoding for pod.
DEBPKG:debian/hurd-softupdates - https://bugs.debian.org/822735 Fix t/op/stat.t failures on hurd
DEBPKG:fixes/nntp_docs - https://bugs.debian.org/51962 Net::NNTP: Correct innd/nnrpd confusion in relation to Reader option
DEBPKG:fixes/math_complex_doc_great_circle - https://bugs.debian.org/697567 [rt.cpan.org #114104] Math::Trig: clarify definition of great_circle_midpoint
DEBPKG:fixes/math_complex_doc_see_also - https://bugs.debian.org/697568 [rt.cpan.org #114105] Math::Trig: add missing SEE ALSO
DEBPKG:fixes/math_complex_doc_angle_units - https://bugs.debian.org/731505 [rt.cpan.org #114106] Math::Trig: document angle units
DEBPKG:fixes/cpan_web_link - https://bugs.debian.org/367291 CPAN: Add link to main CPAN web site
DEBPKG:fixes/time_piece_doc - https://bugs.debian.org/817925 Time::Piece: Improve documentation for add_months and add_years
DEBPKG:fixes/perlbug-refactor - https://bugs.debian.org/822463 [perl #128020] perlbug: Refactor duplicated file reading code
DEBPKG:fixes/perlbug-linewrap - https://bugs.debian.org/822463 [perl #128020] perlbug: wrap overly long lines
DEBPKG:fixes/hurd_sigaction - https://bugs.debian.org/825016 [d54f4ed] ext/POSIX/t/sigaction.t: Skip uid and pid tests on GNU/Hurd
DEBPKG:fixes/hurd_hints - [4694301] https://bugs.debian.org/825020 [perl #128279] Modify hints for Hurd per Debian ticket 825020.
DEBPKG:fixes/extutils-parsexs-reproducibility - [perl #128517] https://bugs.debian.org/829296 Make the output of ExtUtils::ParseXS reproducible
DEBPKG:debian/CVE-2016-1238/sitecustomize-in-etc - Look for sitecustomize.pl in /etc/perl rather than sitelib on Debian systems
DEBPKG:debian/CVE-2016-1238/test-suite-without-dot - [perl #127810] Patch unit tests to explicitly insert "." into @INC when needed.
DEBPKG:debian/CVE-2016-1238/eumm-without-dot - [perl #127810] Add PERL_USE_UNSAFE_INC support to EU::MM for fortify_inc support.
DEBPKG:debian/CVE-2016-1238/cpan-without-dot - [perl #127810] Set PERL_USE_UNSAFE_INC for cpan usage
DEBPKG:debian/document_inc_removal - Document in perlvar that we remove '.' from @INC by default
DEBPKG:fixes/extutils_makemaker_reproducible - https://bugs.debian.org/835815 https://bugs.debian.org/834190 Make perllocal.pod files reproducible
DEBPKG:debian/CVE-2016-1238/remove-inc-test - Remove test for '.' in @INC as it might not be
DEBPKG:fixes/file_path_hurd_errno - File-Path: Fix test failure in Hurd due to hard-coded ENOENT
DEBPKG:debian/hppa_op_optimize_workaround - https://bugs.debian.org/838613 Temporarily lower the optimization of op.c on hppa due to gcc-6 problems
DEBPKG:fixes/test-builder-warning - https://bugs.debian.org/840968 Silence a 'used only once' warning in Test::Builder
DEBPKG:fixes/longdblinf-randomness - [dd68853] [perl #130133] https://bugs.debian.org/844752 Configure: fix garbage filtering with 80-bit long doubles
DEBPKG:debian/installman-utf8 - https://bugs.debian.org/840211 Generate man pages with UTF-8 characters
DEBPKG:fixes/list_assign_leak - [1050723] [perl #130766] https://bugs.debian.org/855064 avoid a leak in list assign from/to magic values
DEBPKG:fixes/perlfunc_inc_doc - [a03e9f8] https://bugs.debian.org/839536 [perl #130832] Documentation fixes for '.' possibly no longer being in @INC
DEBPKG:fixes/file_path_chmod_race - https://bugs.debian.org/863870 [rt.cpan.org #121951] Prevent directory chmod race attack.
DEBPKG:fixes/extutils_file_path_compat - Correct the order of tests of chmod(). (#294)
DEBPKG:debian/customized - Update customized.dat for files patched in Debian
DEBPKG:fixes/getopt-long-1 - https://bugs.debian.org/855532 [rt.cpan.org #114999] Fix bug RT#114999
DEBPKG:fixes/getopt-long-2 - [rt.cpan.org #120300] Withdraw part of commit 5d9947fb445327c7299d8beb009d609bc70066c0, which tries to implement more GNU getopt_long campatibility. GNU
DEBPKG:fixes/getopt-long-3 - provide a default value for optional arguments
DEBPKG:fixes/getopt-long-4 - https://bugs.debian.org/864544 [rt.cpan.org #122068] Fix issue #122068.
DEBPKG:fixes/fbm-instr-crash - [bb152a4] [perl #131575] https://bugs.debian.org/864782 don't call Perl_fbm_instr() with negative length
DEBPKG:debian/CVE-2016-1238/base-pm-amends-pt2 - [1afa289] Limit dotless-INC effect on base.pm with guard:
DEBPKG:fixes/CVE-2017-12837 - https://bugs.debian.org/875596 [perl #131582] [f7e5417] regcomp [perl #131582]
DEBPKG:fixes/CVE-2017-12883 - https://bugs.debian.org/875597 [perl #131598] [40b3cda] PATCH: [perl #131598]
DEBPKG:fixes/CVE-2018-6797 - [perl #132227] (perl #132227) restart a node if we change to uni rules within the node and encounter a sharp S
DEBPKG:fixes/CVE-2018-6798/pt1 - [perl #132063] Heap buffer overflow
DEBPKG:fixes/CVE-2018-6798/pt2 - [perl #132063] v5.24.3: fix TRIE_READ_CHAR and DECL_TRIE_TYPE to account for non-utf8 target
DEBPKG:fixes/CVE-2018-6798/pt3 - [perl #132063] (perl #132063) we should no longer warn for this code
DEBPKG:fixes/CVE-2018-6913 - [perl #131844] (perl #131844) fix various space calculation issues in pp_pack.c
DEBPKG:fixes/CVE-2018-12015-Archive-Tar-directory-traversal - https://bugs.debian.org/900834 [rt.cpan.org #125523] Remove existing files before overwriting them
Built under linux
Compiled at Jun 10 2018 17:37:28
%ENV:
PERL_LWP_USE_HTTP_10="1"
PERL_USE_UNSAFE_INC="1"
@INC:
/etc/perl
/usr/local/lib/x86_64-linux-gnu/perl/5.24.1
/usr/local/share/perl/5.24.1
/usr/lib/x86_64-linux-gnu/perl5/5.24
/usr/share/perl5
/usr/lib/x86_64-linux-gnu/perl/5.24
/usr/share/perl/5.24
/usr/local/lib/site_perl
/usr/lib/x86_64-linux-gnu/perl-base
.
*** Packages of interest status:
Apache2 : -
Apache2::Request : -
CGI : 4.35
ExtUtils::MakeMaker: 7.10_02
LWP : 6.15
mod_perl : -
mod_perl2 : 2.000010
3. This is the core dump trace: (if you get a core dump):
root at fsdev:/etc/apache2/conf-enabled# gdb /usr/sbin/apache2
GNU gdb (Debian 7.12-6) 7.12.0.20161007-git
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/sbin/apache2...Reading symbols from /usr/lib/debug/.build-id/c8/eab9066e6011671f5df7b69241918ba303f37f.debug...done.
done.
(gdb) run -DONE_PROCESS -DNO_DETACH -k start
Starting program: /usr/sbin/apache2 -DONE_PROCESS -DNO_DETACH -k start
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff28c3c80 in ?? ()
(gdb) bt
#0 0x00007ffff28c3c80 in ?? ()
#1 <signal handler called>
#2 0x00007ffff74fdaea in __waitpid (pid=11642, stat_loc=0x7fffffffdd44, options=0) at ../sysdeps/unix/sysv/linux/waitpid.c:29
#3 0x00007ffff3eef685 in Perl_wait4pid () from /usr/lib/x86_64-linux-gnu/libperl.so.5.24
#4 0x00007ffff3eeff92 in Perl_my_pclose () from /usr/lib/x86_64-linux-gnu/libperl.so.5.24
#5 0x00007ffff3f5878c in Perl_pp_backtick () from /usr/lib/x86_64-linux-gnu/libperl.so.5.24
#6 0x00007ffff3f0bb56 in Perl_runops_standard () from /usr/lib/x86_64-linux-gnu/libperl.so.5.24
#7 0x00007ffff3e8c619 in Perl_eval_sv () from /usr/lib/x86_64-linux-gnu/libperl.so.5.24
#8 0x00007ffff3e8cc45 in Perl_require_pv () from /usr/lib/x86_64-linux-gnu/libperl.so.5.24
#9 0x00007ffff4247bae in modperl_require_file () from /usr/lib/apache2/modules/mod_perl.so
#10 0x00007ffff424111c in modperl_config_apply_PerlRequire () from /usr/lib/apache2/modules/mod_perl.so
#11 0x00007ffff423eb8c in modperl_startup () from /usr/lib/apache2/modules/mod_perl.so
#12 0x00007ffff423e9a3 in modperl_startup () from /usr/lib/apache2/modules/mod_perl.so
#13 0x00007ffff423ee06 in modperl_init () from /usr/lib/apache2/modules/mod_perl.so
#14 0x00007ffff423ef76 in modperl_hook_init () from /usr/lib/apache2/modules/mod_perl.so
#15 0x00005555555ab9c3 in ap_run_open_logs (pconf=0x7ffff7fed028, plog=0x7ffff7fbc028, ptemp=0x7ffff7fbe028, s=0x7ffff7fc14a0)
at config.c:161
#16 0x0000555555587bf8 in main (argc=<optimized out>, argv=<optimized out>) at main.c:765
(gdb)
This report was generated by /usr/share/libapache2-mod-perl2/mp2bug on Mon Aug 6 22:32:12 2018 GMT.
-------------8<---------- End Bug Report --------------8<----------
-- System Information:
Debian Release: 9.5
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 4.9.0-7-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages libapache2-mod-perl2 depends on:
ii apache2-bin [apache2-api-20120211] 2.4.25-3+deb9u5
ii libapr1 1.5.2-5
ii libaprutil1 1.5.4-3
ii libc6 2.24-11+deb9u3
ii libdevel-symdump-perl 2.17-1
ii libperl5.24 5.24.1-3+deb9u4
ii liburi-perl 1.71-1
ii libwww-perl 6.15-1
ii netbase 5.4
ii perl 5.24.1-3+deb9u4
ii perl-base [perlapi-5.24.1] 5.24.1-3+deb9u4
Versions of packages libapache2-mod-perl2 recommends:
ii libapache2-reload-perl 0.13-1
ii libbsd-resource-perl 1.2910-1+b1
libapache2-mod-perl2 suggests no packages.
-- no debconf information
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