What is CVE-2018-18314?

CVE-2018-18314 is a critical-severity software vulnerability (Memory corruption) with a CVSS score of 9.8. Perl before 5.26.3 has a buffer overflow via a crafted regular expression that triggers invalid write operations.

Is CVE-2018-18314 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 6%.

What products does CVE-2018-18314 affect?

Tracked products affected include Perl. Check the version you run to see whether it is affected.

How do I fix CVE-2018-18314?

Apply the vendor fix promptly. An official patch or advisory is available. Upgrade affected products to a fixed version.

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CVE-2018-18314

CRITICAL severity · CVSS 9.8 · Memory corruption

9.8CVSS CRITICAL

Summary

Perl before 5.26.3 has a buffer overflow via a crafted regular expression that triggers invalid write operations.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactHigh

Integrity impactHigh

Availability impactHigh

Exploit probability (EPSS)6%

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products we track (1)

Perl

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://bugzilla.redhat.com/show_bug.cgi?id=1646751 ↗

Additional information

NVD record
https://bugzilla.redhat.com/show_bug.cgi?id=1646751Patch
https://github.com/Perl/perl5/commit/19a498a461d7c81ae3507c450953d1148efecf4fPatch
http://www.securityfocus.com/bid/106145Advisory
http://www.securitytracker.com/id/1042181Advisory
https://access.redhat.com/errata/RHSA-2019:0001Advisory
https://access.redhat.com/errata/RHSA-2019:0010Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWQGEB543QN7SSBRKYJM6PSOC3RLYGSM/
https://metacpan.org/changes/release/SHAY/perl-5.26.3Advisory