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Fencer Vulns
high 7.0

CVE-2023-47038 json

Perl: write past buffer end via illegal user-defined unicode property

published 2023-12-18 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-51193

cvss
7.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

A vulnerability was found in perl 5.30.0 through 5.38.0. This issue occurs when a crafted regular expression is compiled by perl, which can allow an attacker controlled byte buffer overflow in a heap allocated buffer.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 8 8100020240314121426.9fe1d287
  • Red Hat Red Hat Enterprise Linux 9 4:5.32.1-481.el9
  • perl Debian 12 5.36.0-7+deb12u1
  • perl Debian 14, Debian 13 5.36.0-10

debian advisories DEBIAN-CVE-2023-47038

  • perl Ubuntu 20.04 LTS 5.30.0-9ubuntu0.5
  • perl Ubuntu 22.04 LTS 5.34.0-3ubuntu1.3
  • perl Ubuntu 24.04 LTS 5.36.0-10ubuntu1

ubuntu advisories UBUNTU-CVE-2023-47038

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • perl RHEL 8 4:5.32.1-473.module+el8.10.0+21354+3ad137bb
  • perl-B RHEL 8 1.80-473.module+el8.10.0+21354+3ad137bb
  • perl-if RHEL 8 0.60.800-473.module+el8.10.0+21354+3ad137bb
  • perl-IO RHEL 8 1.43-473.module+el8.10.0+21354+3ad137bb
  • perl-ph RHEL 8 5.32.1-473.module+el8.10.0+21354+3ad137bb
  • perl-Env RHEL 8 1.04-396.module+el8.10.0+21354+3ad137bb
  • perl-lib RHEL 8 0.65-473.module+el8.10.0+21354+3ad137bb
  • perl-mro RHEL 8 1.23-473.module+el8.10.0+21354+3ad137bb

red hat advisories RHSA-2024:3128RHSA-2024:2228

  • perl openSUSE Tumbleweed 5.38.2-1.1

opensuse advisories openSUSE-SU-2024:13479-1

  • perl AlmaLinux 8 4:5.32.1-473.module_el8.10.0+3779+d5938d28
  • perl-B AlmaLinux 8 1.80-473.module_el8.10.0+3779+d5938d28
  • perl-if AlmaLinux 8 0.60.800-473.module_el8.10.0+3779+d5938d28
  • perl-IO AlmaLinux 8 1.43-473.module_el8.10.0+3779+d5938d28
  • perl-ph AlmaLinux 8 5.32.1-473.module_el8.10.0+3779+d5938d28
  • perl-Env AlmaLinux 8 1.04-396.module_el8.6.0+2766+8bf0b7ce
  • perl-lib AlmaLinux 8 0.65-473.module_el8.10.0+3779+d5938d28
  • perl-mro AlmaLinux 8 1.23-473.module_el8.10.0+3779+d5938d28

almalinux advisories ALSA-2024:3128ALSA-2024:2228

  • perl Rocky Linux 9 4:5.32.1-481.el9
  • perl Rocky Linux 8 4:5.32.1-473.module+el8.10.0+1616+0d20cc68
  • perl-Env Rocky Linux 8 1.04-396.module+el8.10.0+1616+0d20cc68
  • perl-Env Rocky Linux 8 1.04-396.module+el8.6.0+878+f93dfff7
  • perl-Env Rocky Linux 8 1.04-396.module+el8.6.0+882+2fa1e48f
  • perl-URI Rocky Linux 8 1.76-5.module+el8.10.0+1616+0d20cc68
  • perl-URI Rocky Linux 8 1.76-5.module+el8.6.0+878+f93dfff7
  • perl-Carp Rocky Linux 8 1.50-439.module+el8.10.0+1616+0d20cc68

rocky linux advisories RLSA-2024:2228RLSA-2024:3128

  • perl Alpine 3.16, Alpine 3.15 5.34.2-r0
  • perl Alpine 3.18, Alpine 3.17 5.36.2-r0
  • perl Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 5.38.1-r0

alpine advisories ALPINE-CVE-2023-47038

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-47038 updated cvss 7.0

perl: Write past buffer end via illegal user-defined Unicode property

  • Red Hat Enterprise Linux 8 perl, perl-IO, perl-libs, perl-open, perl-Test, perl-Errno, +19 more
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) perl 5.32.1-473.module+el8.10.0+21354+3ad137bb, perl-B 1.80-473.module+el8.10.0+21354+3ad137bb, perl-URI 1.76-5.module+el8.10.0+21354+3ad137bb, perl-CPAN 2.28-5.module+el8.10.0+21354+3ad137bb, perl-IO 1.43-473.module+el8.10.0+21354+3ad137bb, perl-Tie 4.6-473.module+el8.10.0+21354+3ad137bb, +213 more
    fixed: vendor fix RHSA-2024:3128
  • Red Hat Enterprise Linux AppStream (v. 9) perl 5.32.1-481.el9, perl-B 1.80-481.el9, perl-IO 1.43-481.el9, perl-Tie 4.6-481.el9, perl-lib 0.65-481.el9, perl-mro 1.23-481.el9, +92 more
    fixed: vendor fix RHSA-2024:2228
  • Red Hat Enterprise Linux 6 perl, perl-CGI, perl-core, perl-CPAN, perl-libs, perl-parent, +39 more Red Hat Enterprise Linux 7 perl, perl-core, perl-CPAN, perl-libs, perl-tests, perl-macros, +11 more Red Hat Enterprise Linux 8 perl, perl-IO, perl-libs, perl-open, perl-Test, perl-Errno, +19 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
23 mo ago

Exploit prediction

0.81% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Correct version ranges to account for backported fixes.