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CVE-2020-1983 (GCVE-0-2020-1983)

Vulnerability from cvelistv5 – Published: 2020-04-22 19:30 – Updated: 2024-09-16 19:41
VLAI
Title
libslirp: use after free vulnerability cause a denial of service.
Summary
A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows crafted packets to cause a denial of service.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
slirp libslirp Affected: unspecified , ≤ 4.2.0 (custom)
guessed Create a notification for this product.
Date Public
2020-04-20 00:00
Credits
This issue was discovered by Aviv Sasson of Palo Alto Networks.
Show details on NVD website
To clipboard 

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      "sourceIdentifier": "psirt@paloaltonetworks.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"psirt@paloaltonetworks.com\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-416\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-416\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2020-1983\",\"sourceIdentifier\":\"psirt@paloaltonetworks.com\",\"published\":\"2020-04-22T20:15:11.480\",\"lastModified\":\"2024-11-21T05:11:47.053\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows crafted packets to cause a denial of service.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad de uso de la memoria previamente liberada en la funci\u00f3n ip_reass() en el archivo ip_input.c de libslirp versiones 4.2.0 y anteriores permite que paquetes especialmente dise\u00f1ados causen una denegaci\u00f3n de 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Advisory\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HWFD4MWV3YWIHVHSA2F7FKOLJFL4PHOX/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKT2MTSINE4NUPG5L6BYH6N23NBNITOL/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://usn.ubuntu.com/4372-1/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.debian.org/security/2020/dsa-4665\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T11:56:21+00:00",
      "cve": "CVE-2020-1983",
      "id": "CVE-2020-1983",
      "initial_release_date": "2020-04-02T00:00:00+00:00",
      "product_status:fixed": "2907",
      "product_status:known_affected": "53",
      "product_status:known_not_affected": "41",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "QEMU: slirp: use-after-free in ip_reass() function in ip_input.c",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-1983.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-13T00:07:26Z",
      "cve": "CVE-2020-1983",
      "id": "CVE-2020-1983",
      "initial_release_date": "2023-02-15T04:04:08Z",
      "product_status:known_affected": "707",
      "product_status:known_not_affected": "587",
      "product_status:recommended": "2123",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2020-1983",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2020-1983.json",
      "version": "46"
    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.