Vulnerability-Lookup

RHSA-2022:5526

Vulnerability from csaf_redhat - Published: 2022-07-07 12:00 - Updated: 2025-11-21 18:32

Summary

Red Hat Security Advisory: squid:4 security update

Severity

Important

Notes

Topic: An update for the squid:4 module is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. 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: Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. Security Fix(es): * squid: DoS when processing gopher server responses (CVE-2021-46784) 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.

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-2021-46784

A vulnerability was found in squid (Web proxy cache server). This issue occurs due to improper buffer management while processing Gopher server responses. This flaw leads to a remote denial of service or a crash if it receives specially crafted network traffic, either by mistake or a malicious actor.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-617 - Reachable Assertion

Affected products

Fixed 30 products

Product	Version	Remediation
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-0:1.0.1-2.module+el8.1.0+4044+36416a77.src::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-debuginfo-0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-debuginfo-0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-debuginfo-0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-debuginfo-0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-debugsource-0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-debugsource-0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-debugsource-0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-debugsource-0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-devel-0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-devel-0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-devel-0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:libecap-devel-0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:squid-7:4.15-3.module+el8.6.0+15801+8fa20c64.1.aarch64::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:squid-7:4.15-3.module+el8.6.0+15801+8fa20c64.1.ppc64le::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:squid-7:4.15-3.module+el8.6.0+15801+8fa20c64.1.s390x::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:squid-7:4.15-3.module+el8.6.0+15801+8fa20c64.1.src::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:squid-7:4.15-3.module+el8.6.0+15801+8fa20c64.1.x86_64::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:squid-debuginfo-7:4.15-3.module+el8.6.0+15801+8fa20c64.1.aarch64::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:squid-debuginfo-7:4.15-3.module+el8.6.0+15801+8fa20c64.1.ppc64le::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:squid-debuginfo-7:4.15-3.module+el8.6.0+15801+8fa20c64.1.s390x::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:squid-debuginfo-7:4.15-3.module+el8.6.0+15801+8fa20c64.1.x86_64::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:squid-debugsource-7:4.15-3.module+el8.6.0+15801+8fa20c64.1.aarch64::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:squid-debugsource-7:4.15-3.module+el8.6.0+15801+8fa20c64.1.ppc64le::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:squid-debugsource-7:4.15-3.module+el8.6.0+15801+8fa20c64.1.s390x::squid:4	—	Vendor Fix fix
Unresolved product id: AppStream-8.6.0.Z.MAIN.EUS:squid-debugsource-7:4.15-3.module+el8.6.0+15801+8fa20c64.1.x86_64::squid:4	—	Vendor Fix fix

Threats

Impact Important

References

9 references

URL	Category
https://access.redhat.com/errata/RHSA-2022:5526	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=2100721	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2021-46784	self
https://bugzilla.redhat.com/show_bug.cgi?id=2100721	external
https://www.cve.org/CVERecord?id=CVE-2021-46784	external
https://nvd.nist.gov/vuln/detail/CVE-2021-46784	external
https://github.com/squid-cache/squid/security/adv…	external

JSON

To clipboard

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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2022:5526"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "squid: DoS when processing gopher server responses"
    }
  ]
}

CVE-2021-46784 (GCVE-0-2021-46784)

Vulnerability from cvelistv5 – Published: 2022-07-17 00:00 – Updated: 2024-08-04 05:17

Summary

In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a Denial of Service can occur when processing long Gopher server responses.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

9 references

URL	Tags
https://github.com/squid-cache/squid/commit/5e2ea…
http://www.squid-cache.org/Versions/v4/changesets…
http://www.squid-cache.org/Versions/v5/changesets…
https://github.com/squid-cache/squid/security/adv…
https://security-tracker.debian.org/tracker/CVE-2…
https://security.netapp.com/advisory/ntap-2022122…
http://www.openwall.com/lists/oss-security/2023/10/13/1	mailing-list
http://www.openwall.com/lists/oss-security/2023/1…	mailing-list
http://www.openwall.com/lists/oss-security/2023/10/21/1	mailing-list

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
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        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:17:42.311Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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          {
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            "url": "https://github.com/squid-cache/squid/commit/5e2ea2b13bd98f53e29964ca26bb0d602a8a12b9"
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          {
            "tags": [
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          },
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            "url": "http://www.squid-cache.org/Versions/v5/changesets/SQUID-2021_7.patch"
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            "url": "https://security.netapp.com/advisory/ntap-20221223-0007/"
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    "cna": {
      "affected": [
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          "vendor": "n/a",
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      "descriptions": [
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        }
      ],
      "problemTypes": [
        {
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              "lang": "en",
              "type": "text"
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      "providerMetadata": {
        "dateUpdated": "2023-10-21T23:06:16.659Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
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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.