What is the CVSS score of CVE-2018-15686?

CVE-2018-15686 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 2.3%.

Is there a public PoC exploit available for CVE-2018-15686?

Yes, a public proof-of-concept exploit is available for CVE-2018-15686. Prioritise patching immediately. EPSS: 2.3%.

Is there a patch available for CVE-2018-15686?

Yes, a patch is available for CVE-2018-15686. Update the affected software to the latest version immediately.

Ubuntu Linux CVE-2018-15686

HIGH

Deserialization of Untrusted Data (CWE-502)

2018-10-26 security@ubuntu.com

Privilege Escalation Deserialization Ubuntu Linux Debian Linux Systemd Communications Cloud Native Core Network Function Cloud Native Environment

7.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Oct 26, 2018 - 14:29 nvd

HIGH 7.8

DescriptionNVD

A vulnerability in unit_deserialize of systemd allows an attacker to supply arbitrary state across systemd re-execution via NotifyAccess. This can be used to improperly influence systemd execution and possibly lead to root privilege escalation. Affected releases are systemd versions up to and including 239.

AnalysisAI

A vulnerability in unit_deserialize of systemd allows an attacker to supply arbitrary state across systemd re-execution via NotifyAccess. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Deserialization of Untrusted Data (CWE-502), which allows attackers to execute arbitrary code through malicious serialized objects. A vulnerability in unit_deserialize of systemd allows an attacker to supply arbitrary state across systemd re-execution via NotifyAccess. This can be used to improperly influence systemd execution and possibly lead to root privilege escalation. Affected releases are systemd versions up to and including 239. Affected products include: Canonical Ubuntu Linux, Debian Debian Linux, Systemd Project Systemd, Oracle Communications Cloud Native Core Network Function Cloud Native Environment.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Avoid deserializing untrusted data. Use safe serialization formats (JSON). Implement integrity checks and type allowlists.