HOMEVULNERABILITIESCVE-2019-12312
HIGH

CVE-2019-12312

CWE-476Published: May 24, 2019· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

In Libreswan 3.27 an assertion failure can lead to a pluto IKE daemon restart. An attacker can trigger a NULL pointer dereference by initiating an IKEv2 IKE_SA_INIT exchange, followed by a bogus INFORMATIONAL exchange instead of the normallly expected IKE_AUTH exchange. This affects send_v2N_spi_response_from_state() in programs/pluto/ikev2_send.c that will then trigger a NULL pointer dereference leading to a restart of libreswan.

NVD Source

Technical Analysis

CVE-2019-12312 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 availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

libreswan1 product(s)
libreswan
Source: NVD CPE · 1 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

PATCHhttps://github.com/libreswan/libreswan/compare/9b1394e...3897683
PATCHhttps://github.com/libreswan/libreswan/compare/9b1394e...3897683
ADVISORYhttp://www.iwantacve.cn/index.php/archives/218/
ADVISORYhttps://github.com/libreswan/libreswan/issues/246
ADVISORYhttp://www.iwantacve.cn/index.php/archives/218/
ADVISORYhttps://github.com/libreswan/libreswan/issues/246

All References (10)

→
http://www.iwantacve.cn/index.php/archives/218/Exploit · Third Party Advisory
→
https://github.com/libreswan/libreswan/compare/9b1394e...3897683Patch · Third Party Advisory
→
https://github.com/libreswan/libreswan/issues/246Third Party Advisory
→
https://libreswan.org/security/CVE-2019-12312/CVE-2019-12312.txt
→
https://libreswan.org/security/CVE-2019-12312/libreswan-3.27-CVE-2019-12312.patch
→
http://www.iwantacve.cn/index.php/archives/218/Exploit · Third Party Advisory
→
https://github.com/libreswan/libreswan/compare/9b1394e...3897683Patch · Third Party Advisory
→
https://github.com/libreswan/libreswan/issues/246Third Party Advisory
→
https://libreswan.org/security/CVE-2019-12312/CVE-2019-12312.txt
→
https://libreswan.org/security/CVE-2019-12312/libreswan-3.27-CVE-2019-12312.patch

Quick Facts

CVE IDCVE-2019-12312
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-476
CISA KEVNo
Affected1 vendor(s)
PublishedMay 24, 2019

Related CVEs (CWE-476)

CVE-2022-36648
10.0
CVE-2010-2495
10.0
CVE-2015-9073
9.8
CVE-2022-26093
9.8
CVE-2023-48697
9.8
CVE-2022-26094
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-12312 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.
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