Home/CVE/regcomp.c in Perl before 5.30.3 allows a buffer overflow via a crafted regular expression because of recursive S_study_c
CVE

CVE-2020-12723

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

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

HIGH · CVSS 7.5 EPSS 0.00191
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules2 YARA rules0
⬡

Weakness Classification

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
▤

Affected Products & Versions

17
perl< 5.30.3
netapp oncommand workflow automationall versions
netapp snap creator frameworkall versions
fedoraproject fedoraall versions
opensuse leapall versions
oracle communications billing and revenue managementall versions
oracle communications diameter signaling router>= 8.0.0 and <= 8.5.0
oracle communications eagle application processor>= 16.1.0 and <= 16.4.0
◈

Sigma Hunt Rules

2
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighPotential Perl Reverse Shell Execution
productmediumPerl Inline Command Execution
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD05 Jun 2020 · 03:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

16
suse-csafopenSUSE-SU-2024:11158-1
siemens-csafSSA-398330
rhsaRHSA-2026:7604Moderate
usnUSN-4602-2
usnUSN-4602-1
🔗

References & Sources

16
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00044.htmlMailing ListThird Party Advisory
https://github.com/Perl/perl5/blob/blead/pod/perl5303delta.podThird Party Advisory
https://github.com/Perl/perl5/compare/v5.30.2...v5.30.3PatchThird Party Advisory
https://github.com/Perl/perl5/issues/16947Third Party Advisory
https://github.com/Perl/perl5/issues/17743Third Party Advisory
https://github.com/perl/perl5/commit/66bbb51b93253a3f87d11c2695cfb7bdb782184aPatchThird Party Advisory
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