Vulnerability-Lookup

RHSA-2020:1604

Vulnerability from csaf_redhat - Published: 2020-04-28 16:04 - Updated: 2025-11-21 18:13

Summary

Red Hat Security Advisory: tcpdump security update

Severity

Low

Notes

Topic: An update for tcpdump is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: The tcpdump packages contain the tcpdump utility for monitoring network traffic. The tcpdump utility can capture and display the packet headers on a particular network interface or on all interfaces. Security Fix(es): * tcpdump: Stack-based buffer over-read in print-hncp.c:print_prefix() via crafted pcap (CVE-2018-19519) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.2 Release Notes linked from the References section.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2018-19519

In tcpdump 4.9.2, a stack-based buffer over-read exists in the print_prefix function of print-hncp.c via crafted packet data because of missing initialization.

4.3 (Medium)


                
                  CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

CWE-125 - Out-of-bounds Read

Affected products

Fixed 13 products

Product	Version	Remediation
Unresolved product id: AppStream-8.2.0.GA:tcpdump-14:4.9.2-6.el8.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-8.2.0.GA:tcpdump-14:4.9.2-6.el8.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-8.2.0.GA:tcpdump-14:4.9.2-6.el8.s390x	—	Vendor Fix fix
Unresolved product id: AppStream-8.2.0.GA:tcpdump-14:4.9.2-6.el8.src	—	Vendor Fix fix
Unresolved product id: AppStream-8.2.0.GA:tcpdump-14:4.9.2-6.el8.x86_64	—	Vendor Fix fix
Unresolved product id: AppStream-8.2.0.GA:tcpdump-debuginfo-14:4.9.2-6.el8.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-8.2.0.GA:tcpdump-debuginfo-14:4.9.2-6.el8.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-8.2.0.GA:tcpdump-debuginfo-14:4.9.2-6.el8.s390x	—	Vendor Fix fix
Unresolved product id: AppStream-8.2.0.GA:tcpdump-debuginfo-14:4.9.2-6.el8.x86_64	—	Vendor Fix fix
Unresolved product id: AppStream-8.2.0.GA:tcpdump-debugsource-14:4.9.2-6.el8.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-8.2.0.GA:tcpdump-debugsource-14:4.9.2-6.el8.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-8.2.0.GA:tcpdump-debugsource-14:4.9.2-6.el8.s390x	—	Vendor Fix fix
Unresolved product id: AppStream-8.2.0.GA:tcpdump-debugsource-14:4.9.2-6.el8.x86_64	—	Vendor Fix fix

Threats

Impact Low

References

10 references

URL	Category
https://access.redhat.com/errata/RHSA-2020:1604	self
https://access.redhat.com/security/updates/classi…	external
https://access.redhat.com/documentation/en-us/red…	external
https://bugzilla.redhat.com/show_bug.cgi?id=1655374	external
https://bugzilla.redhat.com/show_bug.cgi?id=1715423	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2018-19519	self
https://bugzilla.redhat.com/show_bug.cgi?id=1655374	external
https://www.cve.org/CVERecord?id=CVE-2018-19519	external
https://nvd.nist.gov/vuln/detail/CVE-2018-19519	external

JSON

To clipboard

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  "vulnerabilities": [
    {
      "cve": "CVE-2018-19519",
      "cwe": {
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        "name": "Out-of-bounds Read"
      },
      "discovery_date": "2018-11-26T00:00:00+00:00",
      "ids": [
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        }
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      "notes": [
        {
          "category": "description",
          "text": "In tcpdump 4.9.2, a stack-based buffer over-read exists in the print_prefix function of print-hncp.c via crafted packet data because of missing initialization.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "tcpdump: Stack-based buffer over-read in print-hncp.c:print_prefix() via crafted pcap",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue affects the versions of tcpdump as shipped with Red Hat Enterprise Linux 7.\n\nThis issue did not affect the versions of tcpdump as shipped with Red Hat Enterprise Linux 5 and 6.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "AppStream-8.2.0.GA:tcpdump-14:4.9.2-6.el8.aarch64",
          "AppStream-8.2.0.GA:tcpdump-14:4.9.2-6.el8.ppc64le",
          "AppStream-8.2.0.GA:tcpdump-14:4.9.2-6.el8.s390x",
          "AppStream-8.2.0.GA:tcpdump-14:4.9.2-6.el8.src",
          "AppStream-8.2.0.GA:tcpdump-14:4.9.2-6.el8.x86_64",
          "AppStream-8.2.0.GA:tcpdump-debuginfo-14:4.9.2-6.el8.aarch64",
          "AppStream-8.2.0.GA:tcpdump-debuginfo-14:4.9.2-6.el8.ppc64le",
          "AppStream-8.2.0.GA:tcpdump-debuginfo-14:4.9.2-6.el8.s390x",
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          "AppStream-8.2.0.GA:tcpdump-debugsource-14:4.9.2-6.el8.aarch64",
          "AppStream-8.2.0.GA:tcpdump-debugsource-14:4.9.2-6.el8.ppc64le",
          "AppStream-8.2.0.GA:tcpdump-debugsource-14:4.9.2-6.el8.s390x",
          "AppStream-8.2.0.GA:tcpdump-debugsource-14:4.9.2-6.el8.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2018-19519"
        },
        {
          "category": "external",
          "summary": "RHBZ#1655374",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1655374"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2018-19519",
          "url": "https://www.cve.org/CVERecord?id=CVE-2018-19519"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2018-19519",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-19519"
        }
      ],
      "release_date": "2018-12-03T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2020-04-28T16:04:30+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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            "AppStream-8.2.0.GA:tcpdump-debugsource-14:4.9.2-6.el8.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2020:1604"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
            "version": "3.0"
          },
          "products": [
            "AppStream-8.2.0.GA:tcpdump-14:4.9.2-6.el8.aarch64",
            "AppStream-8.2.0.GA:tcpdump-14:4.9.2-6.el8.ppc64le",
            "AppStream-8.2.0.GA:tcpdump-14:4.9.2-6.el8.s390x",
            "AppStream-8.2.0.GA:tcpdump-14:4.9.2-6.el8.src",
            "AppStream-8.2.0.GA:tcpdump-14:4.9.2-6.el8.x86_64",
            "AppStream-8.2.0.GA:tcpdump-debuginfo-14:4.9.2-6.el8.aarch64",
            "AppStream-8.2.0.GA:tcpdump-debuginfo-14:4.9.2-6.el8.ppc64le",
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            "AppStream-8.2.0.GA:tcpdump-debugsource-14:4.9.2-6.el8.s390x",
            "AppStream-8.2.0.GA:tcpdump-debugsource-14:4.9.2-6.el8.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "tcpdump: Stack-based buffer over-read in print-hncp.c:print_prefix() via crafted pcap"
    }
  ]
}

CVE-2018-19519 (GCVE-0-2018-19519)

Vulnerability from cvelistv5 – Published: 2018-11-25 20:00 – Updated: 2024-08-05 11:37

Summary

In tcpdump 4.9.2, a stack-based buffer over-read exists in the print_prefix function of print-hncp.c via crafted packet data because of missing initialization.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

9 references

URL	Tags
http://www.securityfocus.com/bid/106098	vdb-entryx_refsource_BID
https://github.com/zyingp/temp/blob/master/tcpdump.md	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://access.redhat.com/errata/RHSA-2019:3976	vendor-advisoryx_refsource_REDHAT
https://usn.ubuntu.com/4252-2/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4252-1/	vendor-advisoryx_refsource_UBUNTU
https://kb.pulsesecure.net/articles/Pulse_Securit…	x_refsource_CONFIRM

Date Public

2018-11-25 00:00

Show details on NVD website

JSON

To clipboard

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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.