CVE-2019-12312

Exp

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.

Published: 2019-05-24 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-12312 is rated High Exploit Risk (68.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.54%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2019-12312

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2019-12312

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.56% 0.54% -0.02%
2 2025-11-18 0.54% 0.56% +0.03%
3 2025-03-30 — 0.54% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-12312

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2019-12312

OS Trackers for CVE-2019-12312

vendor priority summary link
alpine high CVE-2019-12312: 1 source package rows (libreswan); 7 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2019-12312
debian not yet assigned CVE-2019-12312 not yet assigned priority: Debian including 1 source packages (libreswan), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-12312
redhat medium — https://access.redhat.com/security/cve/CVE-2019-12312
suse medium CVE-2019-12312 severity moderate: SUSE including 6 source package names (libreswan-3.29-6.el8, strongswan, strongswan-doc, strongswan-hmac, strongswan-ipsec, strongswan-libs0), 59 product×package rows across 16 product lines (SUSE Liberty Linux 8, SUSE Linux Enterprise Desktop 12 SP4, … (16 product lines)): Known Not Affected 58, Fixed 1. https://www.suse.com/security/cve/CVE-2019-12312/
ubuntu medium CVE-2019-12312 medium priority: Ubuntu including 1 source packages (libreswan), 7 status rows across 7 suites (bionic, cosmic, disco, eoan, trusty, upstream, xenial): not-affected 3, DNE 2, ignored 1, needs-triage 1. https://ubuntu.com/security/CVE-2019-12312

Affected software / configurations for CVE-2019-12312

Vendor Product Version Raw CPE
libreswan libreswan < 3.28 cpe:2.3:a:libreswan:libreswan:*:*:*:*:*:*:*:*

References for CVE-2019-12312

cvelogic Threat Intelligence