CVE-2020-12723 @ Janus

"CVE-2020-12723"
"perl-5.28.1-6+deb10u1"
"perl-base-5.28.1-6+deb10u1"
"perl-modules-5.28-5.28.1-6+deb10u1"
"liberror-perl-0.17027-2"
"libio-socket-inet6-perl-2.72-2"
"liblocale-gettext-perl-1.07-3+b4"
"libnet-snmp-perl-6.0.1-5"
"libperl5.28-5.28.1-6+deb10u1"
"libsnmp-session-perl-1.14~git20130523.186a005-4"
"libsocket6-perl-0.29-1+b1"
"libtext-charwidth-perl-0.04-7.1+b1"
"libtext-iconv-perl-1.7-5+b7"
"libtext-wrapi18n-perl-0.06-7.1"
"Am I vulnerable?"

Status

new

Priority

0.62

Match score

4.0

Risk

DoS Remote

CVSS

7.5 HIGH

Reason

cpe: perl; pkgs: perl; version: in-range: perl-5.28.1-6+deb10u1, perl-base-5.28.1-6+deb10u1, perl-modules-5.28-5.28.1-6+deb10u1; risk:dos

Created

2026-10-15T10:20:43Z

Updated

2026-10-20T10:18:51Z

Package interrogation (copy)

Run on the host — click to copy a command. Debian/apt

Package	Commands
perl-5.28.1-6+deb10u1
perl-base-5.28.1-6+deb10u1
perl-modules-5.28-5.28.1-6+deb10u1
liberror-perl-0.17027-2
libio-socket-inet6-perl-2.72-2
liblocale-gettext-perl-1.07-3+b4
libnet-snmp-perl-6.0.1-5
libperl5.28-5.28.1-6+deb10u1
libsnmp-session-perl-1.14~git20130523.186a005-4
libsocket6-perl-0.29-1+b1
libtext-charwidth-perl-0.04-7.1+b1
libtext-iconv-perl-1.7-5+b7
libtext-wrapi18n-perl-0.06-7.1

Inventory lookup

Search package inventory across systems, then return here. Create a ticket on systems the matcher missed.

Suggestions: perl · perl-base · perl-modules

System	Matches	Ticket for CVE-2020-12723
Archive	perl-modules-5.24 5.24.1-3+deb9u7; perl-modules-5.28 5.28.1-6+deb10u1	new open
Janus	perl-modules-5.28 5.28.1-6+deb10u1	new open
Library	perl-modules 5.20.2-3+deb8u9; perl-modules-5.24 5.24.1-3+deb9u7	new open
Saiph	perl-modules 5.20.2-3+deb8u7; perl-modules-5.24 5.24.1-3+deb9u5; perl-modules-5.28 5.28.1-6+deb10u1	new open
Bullseye	perl-modules-5.32 5.32.1-4+deb11u5	none
Helios	perl-modules-5.32 5.32.1-4+deb11u5	none
Matrix	perl-modules-5.36 5.36.0-7+deb12u4	none
Silk	perl-modules-5.36 5.36.0-7+deb12u4	none

Related CVE (same fix)

Point this ticket’s CVE at a higher-priority / same-fix primary so you only triage one.

Host OS / kernel

Debian GNU/Linux 10 (buster) (10) · debian

Arch

x86_64

kernel_release

uname -r → 4.19.0-27-amd64

kernel_version

uname -v → #1 SMP Debian 4.19.316-1 (2024-06-25)

For Linux kernel CVEs, kernel_version (Debian packaging / build string) often decides fixed vs not; kernel_release is used for upstream NVD range compares.

Same CVE on other hosts

Open the ticket for this CVE on another system.

System	Status	Priority	Updated
morris	new	7.0	2026-10-20T10:18:51Z	Open
mufasa	new	7.0	2026-10-20T10:18:51Z	Open
Library	new	1.75	2026-10-20T10:18:51Z	Open
Archive	new	0.62	2026-10-20T10:18:51Z	Open
Saiph	new	0.62	2026-10-20T10:18:51Z	Open

Description

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

Update status

Add note only

References

NVD: CVE-2020-12723