systemd: reexec state injection: fgets() on overlong lines leads to line splitting
CVE-2018-15686

7.8HIGH

Key Information:

Vendor

Systemd

Status
Systemd
Vendor
CVE Published:
26 October 2018

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2018-15686?

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 Version(s)

systemd <= 239

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2018-15686 - Proof of Concept

remediate_cesa_2019_2091
Created by hpcprofessional

References

https://security.gentoo.org/glsa/201810-10
vendor-advisoryx_refsource_GENTOO
https://lists.debian.org/debian-lts-announce/2018/11/msg0...
mailing-listx_refsource_MLIST
http://www.securityfocus.com/bid/105747
vdb-entryx_refsource_BID

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

CVSS V3.0

Score:
7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jann Horn
.