CRITICAL
CVE-2018-18311
CWE-190Published: December 7, 2018· Updated: Jun 17, 2026
9.8
CVSS v3.1
Official Description
Perl before 5.26.3 and 5.28.x before 5.28.1 has a buffer overflow via a crafted regular expression that triggers invalid write operations.
Technical Analysis
CVE-2018-18311 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), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Vendors & Products
Apple1 product(s)
mac os x
Canonical1 product(s)
ubuntu linux
Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
mcafee1 product(s)
web gateway
netapp4 product(s)
e-series santricity os controllersnap creator frameworksnapcentersnapdriver
perl1 product(s)
perl
Red Hat8 product(s)
openshift container platformenterprise linuxenterprise linux desktopenterprise linux eusenterprise linux serverenterprise linux server ausenterprise linux server tusenterprise linux workstation
Source: NVD CPE · 27 total CPE entries
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 (56)
→
http://seclists.org/fulldisclosure/2019/Mar/49Mailing List · Third Party Advisory
→
http://www.securityfocus.com/bid/106145Third Party Advisory · VDB Entry
→
http://www.securitytracker.com/id/1042181Third Party Advisory · VDB Entry
→
https://access.redhat.com/errata/RHBA-2019:0327Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2019:0001Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2019:0010Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2019:0109Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1646730Issue Tracking · Patch · Third Party Advisory
→
https://github.com/Perl/perl5/commit/34716e2a6ee2af96078d62b065b7785c001194bePatch · Third Party Advisory
→
https://kc.mcafee.com/corporate/index?page=content&id=SB10278Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2018/11/msg00039.htmlMailing List · Third Party Advisory
Quick Facts
CVE IDCVE-2018-18311
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-190
CISA KEVNo
Affected8 vendor(s)
PublishedDec 7, 2018
Related CVEs (CWE-190)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2018-18311 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.COM. CVE data is provided under the NVD usage policy.