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NVD / CVE Program· CNA mitre

CVE-2022-23094: Libreswan 4.2 through 4.5 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted IKE

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2.6% (FIRST EPSS); higher than 85.6% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: n/a n/a 4.6.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to n/a n/a 4.6 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Libreswan 4.2 through 4.5 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted IKEv1 packet because pluto/ikev1.c wrongly expects that a state object exists. This is fixed in 4.6.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
Jan 14, 2022
Updated
Jun 17, 2026
EPSS
2.6% · 85th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.6%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2022-23094

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
libreswanlibreswan
fedoraprojectfedora
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux10.0
  • fedoraproject fedora34
  • fedoraproject fedora35
  • libreswan libreswan4.2 and later · before 4.6

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8libreswanbefore 4.4-4.el8_54.4-4.el8_5
Alpine:v3.15libreswanfrom 4.2 · before 4.6-r04.6-r0
Debian:11libreswanbefore 4.3-1+deb11u14.3-1+deb11u1
Debian:12libreswanbefore 4.6-14.6-1
Red Hat:enterprise_linux:8::appstreamlibreswanbefore 0:4.4-4.el8_50:4.4-4.el8_5
Red Hat:enterprise_linux:8::appstreamlibreswan-debuginfobefore 0:4.4-4.el8_50:4.4-4.el8_5
Red Hat:enterprise_linux:8::appstreamlibreswan-debugsourcebefore 0:4.4-4.el8_50:4.4-4.el8_5
Red Hat:rhel_eus:8.4::appstreamlibreswanbefore 0:4.3-6.el8_40:4.3-6.el8_4
Red Hat:rhel_eus:8.4::appstreamlibreswan-debuginfobefore 0:4.3-6.el8_40:4.3-6.el8_4
Red Hat:rhel_eus:8.4::appstreamlibreswan-debugsourcebefore 0:4.3-6.el8_40:4.3-6.el8_4
Rocky Linux:8libreswanbefore 0:4.4-4.el8_50:4.4-4.el8_5

Same product

libreswan: all records

Other highest-scoring records for the same primary product.

  • CVE-2013-7283Race condition in the libreswan.spec files for Red Hat Enterprise Linux (RHEL) and Fedora packages in libreswan 3.6 has unspecified impact a
    37Monitor
  • CVE-2020-1763An out-of-bounds buffer read flaw was found in the pluto daemon of libreswan from versions 3.27 till 3.31 where, an unauthenticated attacker
    31Monitor
  • CVE-2019-12312In Libreswan 3.27 an assertion failure can lead to a pluto IKE daemon restart.
    31Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2016-5391Jun 13, 2017 · libreswan before 3.18 allows remote attackers to cause a denial of service (NULL pointer dereference and pluto daemon restart).
    31Monitor
  • ← EarlierCVE-2019-10155Jun 12, 2019 · The Libreswan Project has found a vulnerability in the processing of IKEv1 informational exchange packets which are encrypted and integrity
    12Monitor
  • Later →CVE-2023-23009Feb 21, 2023 · Libreswan 4.9 allows remote attackers to cause a denial of service (assert failure and daemon restart) via crafted TS payload with an incorr
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
n/a n/a4.6 · descriptionVendor (CNA)
almalinux:libreswan4.4-4.el8_5 · AlmaLinux:8Package registry (OSV)
alpine:libreswan4.6-r0 · Alpine:v3.15Package registry (OSV)
debian:libreswan4.6-1 · Debian:12Package registry (OSV)
red hat:libreswan0:4.4-4.el8_5 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:libreswan-debuginfo0:4.4-4.el8_5 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:libreswan-debugsource0:4.4-4.el8_5 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
rocky linux:libreswan0:4.4-4.el8_5 · Rocky Linux:8Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records