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Fencer Vulns
critical 10.0

CVE-2017-20230 json

Storable versions before 3.05 for Perl has a stack overflow

published 2026-04-21 6 mo ago modified 2026-06-17 4 mo ago also EUVD-2017-18967

cvss
10.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

Storable versions before 3.05 for Perl has a stack overflow.

The retrieve_hook function stored the length of the class name into a signed integer but in read operations treated the length as unsigned. This allowed an attacker to craft data that could trigger the overflow.

Patch / fix

  • NWCLARK Storable 3.05
  • perl Debian 14, Debian 13, Debian 12 5.28.0-3

debian advisories DEBIAN-CVE-2017-20230

  • perl-Storable hummingbird 1 3.37-522.1.hum1
  • perl-Storable-tests hummingbird 1 3.37-522.1.hum1

red hat advisories RHSA-2026:7578

  • perl SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 5.18.2-12.32.1

suse advisories SUSE-SU-2026:1567-1

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-2017-20230 updated cvss 6.5

perl-Storable: Storable for Perl: Denial of service via stack overflow in retrieve_hook function

  • Red Hat Enterprise Linux 7 perl-Storable
    affected: no fix available “Fix deferred”
  • Red Hat Hardened Images perl-Storable 3.37-522.1.hum1, perl-Storable-tests 3.37-522.1.hum1
    fixed: vendor fix RHSA-2026:7578
  • Red Hat Enterprise Linux 8 perl-Storable Red Hat Enterprise Linux 9 perl-Storable Red Hat Enterprise Linux 10 perl-Storable
    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
6 mo ago

Exploit prediction

0.64% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CNA 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

  • NWCLARK Storable

Classification

Weakness
  • CWE-121 Stack-based Buffer Overflow

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.