CVE-2021-33910 (GCVE-0-2021-33910)

Vulnerability from cvelistv5 – Published: 2021-07-20 18:13 – Updated: 2025-06-09 15:44
VLAI
Summary
basic/unit-name.c in systemd prior to 246.15, 247.8, 248.5, and 249.1 has a Memory Allocation with an Excessive Size Value (involving strdupa and alloca for a pathname controlled by a local attacker) that results in an operating system crash.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • n/a
Assigner
References
Show details on NVD website
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\"https://github.com/systemd/systemd-stable/commit/4a1c5f34bd3e1daed4490e9d97918e504d19733b\", \"name\": \"https://github.com/systemd/systemd-stable/commit/4a1c5f34bd3e1daed4490e9d97918e504d19733b\", \"refsource\": \"MISC\"}, {\"url\": \"https://github.com/systemd/systemd-stable/commit/764b74113e36ac5219a4b82a05f311b5a92136ce\", \"name\": \"https://github.com/systemd/systemd-stable/commit/764b74113e36ac5219a4b82a05f311b5a92136ce\", \"refsource\": \"MISC\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2LSDMHAKI4LGFOCSPXNVVSEWQFAVFWR7/\", \"name\": \"FEDORA-2021-2a6ba64260\", \"refsource\": \"FEDORA\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/42TMJVNYRY65B4QCJICBYOEIVZV3KUYI/\", \"name\": \"FEDORA-2021-166e461c8d\", \"refsource\": \"FEDORA\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2021/08/04/2\", \"name\": \"[oss-security] 20210804 Re: Pop!_OS Membership to linux-distros list\", \"refsource\": \"MLIST\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2021/08/17/3\", \"name\": \"[oss-security] 20210817 Re: Pop!_OS Membership to linux-distros list\", \"refsource\": \"MLIST\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2021/09/07/3\", \"name\": \"[oss-security] 20210907 Re: Pop!_OS Membership to linux-distros list\", \"refsource\": \"MLIST\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20211104-0008/\", \"name\": \"https://security.netapp.com/advisory/ntap-20211104-0008/\", \"refsource\": \"CONFIRM\"}, {\"url\": \"https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf\", \"name\": \"https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf\", \"refsource\": \"CONFIRM\"}]}, \"data_format\": \"MITRE\", \"description\": {\"description_data\": [{\"lang\": \"eng\", \"value\": \"basic/unit-name.c in systemd prior to 246.15, 247.8, 248.5, and 249.1 has a Memory Allocation with an Excessive Size Value (involving strdupa and alloca for a pathname controlled by a local attacker) that results in an operating system crash.\"}]}, \"problemtype\": {\"problemtype_data\": [{\"description\": [{\"lang\": \"eng\", \"value\": \"n/a\"}]}]}, \"data_version\": \"4.0\", \"CVE_data_meta\": {\"ID\": \"CVE-2021-33910\", \"STATE\": \"PUBLIC\", \"ASSIGNER\": \"cve@mitre.org\"}}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-33910\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-06-09T15:44:25.308Z\", \"dateReserved\": \"2021-06-07T00:00:00.000Z\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2021-07-20T18:13:49.000Z\", \"assignerShortName\": \"mitre\"}",
      "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.