CVE-2018-15686 (GCVE-0-2018-15686)

Vulnerability from cvelistv5 – Published: 2018-10-26 14:00 – Updated: 2025-06-09 15:50
VLAI
Title
systemd: reexec state injection: fgets() on overlong lines leads to line splitting
Summary
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.
Severity
7 (High)
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • fgets() can be confused by overly-long input strings. The first read will return a partial string and subsequent reads will begin as if it were a new line.
Assigner
References
URL Tags
https://security.gentoo.org/glsa/201810-10 vendor-advisoryx_refsource_GENTOO
https://lists.debian.org/debian-lts-announce/2018… mailing-listx_refsource_MLIST
http://www.securityfocus.com/bid/105747 vdb-entryx_refsource_BID
https://www.exploit-db.com/exploits/45714/ exploitx_refsource_EXPLOIT-DB
https://usn.ubuntu.com/3816-1/ vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2019:2091 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3222 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2020:0593 vendor-advisoryx_refsource_REDHAT
https://lists.apache.org/thread.html/r1b103833cb5… mailing-listx_refsource_MLIST
https://www.oracle.com//security-alerts/cpujul2021.html x_refsource_MISC
https://github.com/systemd/systemd/pull/10519 x_refsource_MISC
Impacted products
Vendor Product Version
systemd systemd Affected: unspecified , ≤ 239 (custom)
Create a notification for this product.
Date Public
2018-10-25 00:00
Credits
Jann Horn
Show details on NVD website
To clipboard 

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      "cveMetadata": "{\"cveId\": \"CVE-2018-15686\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-06-09T15:50:48.760Z\", \"dateReserved\": \"2018-08-22T00:00:00.000Z\", \"assignerOrgId\": \"cc1ad9ee-3454-478d-9317-d3e869d708bc\", \"datePublished\": \"2018-10-26T14:00:00.000Z\", \"assignerShortName\": \"canonical\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.