SUSE-SU-2025:01743-1

Vulnerability from csaf_suse - Published: 2025-05-29 11:44 - Updated: 2025-05-29 11:44
Summary
Security update for dnsdist
Severity
Important
Notes
Title of the patch: Security update for dnsdist
Description of the patch: This update for dnsdist fixes the following issues: Update to version 1.9.10. - CVE-2025-30194: illegal memory access (double-free) when processing specially crafted DoH exchanges leads to a denial-of-service (bsc#1242028). - CVE-2025-30193: stack exhaustion when processing too many queries on incoming TCP connections leads to a denial-of-service (bsc#1243378).
Patchnames: SUSE-2025-1743,SUSE-SLE-Module-Basesystem-15-SP7-2025-1743
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2025-30193
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.10-150700.3.3.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.10-150700.3.3.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.10-150700.3.3.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.10-150700.3.3.1.x86_64 —
Vendor Fix
Threats
Impact important
CVE-2025-30194
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Recommended 4 products, the same list as for CVE-2025-30193
Threats
Impact important
References
To clipboard 

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          "text": "https://www.suse.com/security/cve/CVE-2025-30193"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In some circumstances, when DNSdist is configured to allow an unlimited number of queries on a single, incoming TCP connection from a client, an attacker can cause a denial of service by crafting a TCP exchange that triggers an exhaustion of the stack and a crash of DNSdist, causing a denial of service.\n\nThe remedy is: upgrade to the patched 1.9.10 version.\n\nA workaround is to restrict the maximum number of queries on incoming TCP connections to a safe value, like 50, via the setMaxTCPQueriesPerConnection setting.\n\nWe would like to thank Renaud Allard for bringing this issue to our attention.",
          "title": "CVE description"
        }
      ],
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          "summary": "SUSE Bug 1243378 for CVE-2025-30193",
          "url": "https://bugzilla.suse.com/1243378"
        }
      ],
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        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.10-150700.3.3.1.aarch64",
            "SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.10-150700.3.3.1.ppc64le",
            "SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.10-150700.3.3.1.s390x",
            "SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.10-150700.3.3.1.x86_64"
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          "date": "2025-05-29T11:44:30Z",
          "details": "important"
        }
      ],
      "title": "CVE-2025-30193"
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    {
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          "text": "https://www.suse.com/security/cve/CVE-2025-30194"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "When DNSdist is configured to provide DoH via the nghttp2 provider, an attacker can cause a denial of service by crafting a DoH exchange that triggers an illegal memory access (double-free) and crash of DNSdist, causing a denial of service.\n\nThe remedy is: upgrade to the patched 1.9.9 version.\n\nA workaround is to temporarily switch to the h2o provider until DNSdist has been upgraded to a fixed version.\n\nWe would like to thank Charles Howes for bringing this issue to our attention.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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          "SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.10-150700.3.3.1.s390x",
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          "url": "https://bugzilla.suse.com/1242028"
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      "threats": [
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          "date": "2025-05-29T11:44:30Z",
          "details": "important"
        }
      ],
      "title": "CVE-2025-30194"
    }
  ]
}



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Sightings

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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.
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  • 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.



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