CRITICAL
CVE-2018-18313
CWE-125Published: December 7, 2018· Updated: Jun 17, 2026
9.1
CVSS v3.1
Official Description
Perl before 5.26.3 has a buffer over-read via a crafted regular expression that triggers disclosure of sensitive information from process memory.
Technical Analysis
CVE-2018-18313 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 9.1.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
ADVISORYhttps://usn.ubuntu.com/3834-1/
ADVISORYhttps://usn.ubuntu.com/3834-2/
ADVISORYhttps://usn.ubuntu.com/3834-1/
ADVISORYhttps://usn.ubuntu.com/3834-2/
All References (34)
→
http://seclists.org/fulldisclosure/2019/Mar/49Third Party Advisory
→
http://www.securitytracker.com/id/1042181Third Party Advisory · VDB Entry
→
https://access.redhat.com/errata/RHSA-2019:0001Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2019:0010Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1646738Issue Tracking · Patch · Third Party Advisory
→
https://github.com/Perl/perl5/commit/43b2f4ef399e2fd7240b4eeb0658686ad95f8e62Patch · Third Party Advisory
→
https://metacpan.org/changes/release/SHAY/perl-5.26.3Third Party Advisory
→
https://rt.perl.org/Ticket/Display.html?id=133192Exploit · Third Party Advisory
→
https://seclists.org/bugtraq/2019/Mar/42Mailing List · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20190221-0003/Third Party Advisory
→
https://support.apple.com/kb/HT209600Third Party Advisory
→
https://usn.ubuntu.com/3834-1/Third Party Advisory
→
https://usn.ubuntu.com/3834-2/Third Party Advisory
Quick Facts
CVE IDCVE-2018-18313
CVSS Score9.1 / 10
SeverityCRITICAL
WeaknessCWE-125
CISA KEVNo
Affected6 vendor(s)
PublishedDec 7, 2018
Related CVEs (CWE-125)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2018-18313 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.