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SUSE-SU-2025:20118-1

Vulnerability from csaf_suse - Published: 2025-02-03 09:22 - Updated: 2025-02-03 09:22
Summary
Security update for dnsmasq
Severity
Important
Notes
Title of the patch: Security update for dnsmasq
Description of the patch: This update for dnsmasq fixes the following issues: - Update to 2.90: * CVE-2023-50387, CVE-2023-50868: Fixed a Denial Of Service while trying to validate specially crafted DNSSEC responses (bsc#1219823, bsc#1219826). * Fix reversion in --rev-server introduced in 2.88 which caused breakage if the prefix length is not exactly divisible by 8 (IPv4) or 4 (IPv6). * Fix possible SEGV when there server(s) for a particular domain are configured, but no server which is not qualified for a particular domain. * Set the default maximum DNS UDP packet sice to 1232. * Add --no-dhcpv4-interface and --no-dhcpv6-interface for better control over which interfaces are providing DHCP service. * Fix issue with stale caching * Add configurable caching for arbitrary RR-types. * Add --filter-rr option, to filter arbitrary RR-types. - SLP got dropped, remove config (bsc#1214884)
Patchnames: SUSE-SLE-Micro-6.0-185
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-2023-28450
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.0:dnsmasq-2.90-1.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:dnsmasq-2.90-1.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:dnsmasq-2.90-1.1.x86_64 —
Vendor Fix
Threats
Impact moderate
CVE-2023-50387
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 3 products, the same list as for CVE-2023-28450
Threats
Impact important
CVE-2023-50868
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 3 products, the same list as for CVE-2023-28450
Threats
Impact important
References
To clipboard 

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            "SUSE Linux Micro 6.0:dnsmasq-2.90-1.1.x86_64"
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        }
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      ],
      "notes": [
        {
          "category": "general",
          "text": "Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the \"KeyTrap\" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records.",
          "title": "CVE description"
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        }
      ],
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          "text": "The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the \"NSEC3\" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.",
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            "SUSE Linux Micro 6.0:dnsmasq-2.90-1.1.x86_64"
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          "date": "2025-02-03T09:22:40Z",
          "details": "important"
        }
      ],
      "title": "CVE-2023-50868"
    }
  ]
}



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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

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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.
  • 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.


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