BlackTreeCVE Intelligence
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Full vulnerability report · 2017
CVE-2017-14491High confidence

Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a crafted DNS response

n/a · n/a

9.8CriticalCVSS 3.1
Recommended action
Within 72 hours

Critical technical impact with a remotely reachable, unauthenticated path and a public exploit reference; no CISA KEV confirmation is currently recorded.

Patch available
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2017-5994

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 72 hours

Critical technical impact with a remotely reachable, unauthenticated path and a public exploit reference; no CISA KEV confirmation is currently recorded.

Patch available
01

What, why and how

Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a crafted DNS response.

What

Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a crafted DNS response.

Why

A bounds error lets data be written beyond the intended memory region, potentially corrupting control data.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.

What

Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a crafted DNS response.

Why

A bounds error lets data be written beyond the intended memory region, potentially corrupting control data.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
a network path → Out-of-bounds Write → execute code or commands in the affected security context
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-787 ↗

CWE-787: Out-of-bounds Write. The product writes data past the end, or before the beginning, of the intended buffer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
NetworkUnauthenticatedRemote code executionDenial of serviceCWE-787Public exploit reference
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

Canadian Centre for Cyber Security · English · AV18-006SierraWireless ALEOS update 4.4.5 for AirLink devices

E-2016-0705, CVE-2016-2105, CVE-2016-2183, CVE-2016-0797, CVE-2016-2106, CVE-2016-6302, CVE-2016-0798, CVE-2016-2107, CVE-2016-6303, CVE-2016-0799, CVE-2016-2109, CVE-2016-6304, CVE-2016-0800, CVE-2016-2176, CVE-2016-6306, CVE-2016-2842, CVE-2016-2177, CVE-2015-3195, CVE-2015-1794, CVE-2016-2178, CVE-2015-3197, CVE-2015-3193, CVE-2016-2179, CVE-2015-3194, CVE-2016-2180 Dropbear: CVE-2017-9078 and CVE-2017-9079 Tcpdump and Libpcap: CVE-2014-8769 and CVE-2014-8767 Linux kernel: CVE-2017-14106, CVE-2014-7822, CVE-2014-9888, CVE-2015-3288 OpenVPN: CVE-2017-7520 and CVE-2017-7479 SNMP: CVE-2015-5621 Libcurl: CVE-2016-5421 Dnsmasq: CVE-2017-14496, CVE-2017-14491, CVE-2017-14492, CVE-2017-14493, CVE-2017-14494, CVE-2017-14495 Suggested Action CCIRC recommends that system administrators test and deploy the vendor released updates on affected platforms accordingly. CCIRC recommends confirming if your remote access, mobile or off-site solutions include this type of cellular gateway. Contact your integrator or service provider for more information on how to properly test and deploy the vendor released updates on affected platforms accordingly. References: Release Notes: https://source.sierrawireless.com/resources/airlink/software_reference_docs/release-notes/aleos-4,-d-,4,-d-,5-release-notes/ (1) Product

Official advisory ↗
Canadian Centre for Cyber Security · English · AV17-147GNU dnsmasq security updates

GNU dnsmasq released security updates to address multiple vulnerabilities in dnsmasq. A remote user could exploit some of these vulnerabilities to take control of an affected system. Versions Affected: GNU dnsmasq 2.62 to 2.77 CVE References: CVE-2017-13704, CVE-2017-14491,CVE-2017-14492,CVE-2017-14493,CVE-2017-14494,CVE-2017-14495,CVE-2017-14496

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0203Multiples vulnérabilités dans les produits Siemens

oductcert/html/ssa-576771.html Bulletin de sécurité Siemens SSA-653855 du 12 mars 2024 https://cert-portal.siemens.com/productcert/html/ssa-653855.html Bulletin de sécurité Siemens SSA-770721 du 12 mars 2024 https://cert-portal.siemens.com/productcert/html/ssa-770721.html Bulletin de sécurité Siemens SSA-792319 du 12 mars 2024 https://cert-portal.siemens.com/productcert/html/ssa-792319.html Bulletin de sécurité Siemens SSA-832273 du 12 mars 2024 https://cert-portal.siemens.com/productcert/html/ssa-832273.html Bulletin de sécurité Siemens SSA-918992 du 12 mars 2024 https://cert-portal.siemens.com/productcert/html/ssa-918992.html Référence CVE CVE-2017-14491 https://www.cve.org/CVERecord?id=CVE-2017-14491 Référence CVE CVE-2017-18509 https://www.cve.org/CVERecord?id=CVE-2017-18509 Référence CVE CVE-2020-0338 https://www.cve.org/CVERecord?id=CVE-2020-0338 Référence CVE CVE-2020-0417 https://www.cve.org/CVERecord?id=CVE-2020-0417 Référence CVE CVE-2020-10768 https://www.cve.org/CVERecord?id=CVE-2020-10768 Référence CVE CVE-2020-11301 https://www.cve.org/CVERecord?id=CVE-2020-11301 Référence CVE CVE-2020-14305 https://www.cve.org/CVERecord?id=CVE-2020-14305 Référence CVE CVE-2020-14381 https://www.cve.org/CVERecord?id=CVE-2020-14381 Référence CVE CVE-2020-15436 https://www.cve.org/CVERecord?id=CVE-

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-267Multiples vulnérabilités dans Juniper Networks Junos Space

d?id=CVE-2017-13089 Référence CVE CVE-2017-13090 https://www.cve.org/CVERecord?id=CVE-2017-13090 Référence CVE CVE-2017-13672 https://www.cve.org/CVERecord?id=CVE-2017-13672 Référence CVE CVE-2017-13711 https://www.cve.org/CVERecord?id=CVE-2017-13711 Référence CVE CVE-2017-13720 https://www.cve.org/CVERecord?id=CVE-2017-13720 Référence CVE CVE-2017-13722 https://www.cve.org/CVERecord?id=CVE-2017-13722 Référence CVE CVE-2017-14033 https://www.cve.org/CVERecord?id=CVE-2017-14033 Référence CVE CVE-2017-14064 https://www.cve.org/CVERecord?id=CVE-2017-14064 Référence CVE CVE-2017-14167 https://www.cve.org/CVERecord?id=CVE-2017-14167 Référence CVE CVE-2017-14491 https://www.cve.org/CVERecord?id=CVE-2017-14491 Référence CVE CVE-2017-14492 https://www.cve.org/CVERecord?id=CVE-2017-14492 Référence CVE CVE-2017-14493 https://www.cve.org/CVERecord?id=CVE-2017-14493 Référence CVE CVE-2017-14494 https://www.cve.org/CVERecord?id=CVE-2017-14494 Référence CVE CVE-2017-14495 https://www.cve.org/CVERecord?id=CVE-2017-14495 Référence CVE CVE-2017-14496 https://www.cve.org/CVERecord?id=CVE-2017-14496 Référence CVE CVE-2017-15124 https://www.cve.org/CVERecord?id=CVE-2017-15124 Référence CVE CVE-2017-15268 https://www.cve.org/CVERecord?id=CVE-2017-15268 Référence CVE CVE-2017-15289 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-155Multiples vulnérabilités dans Google Android

rrectif du 01 mars 2021 Résumé De multiples vulnérabilités ont été découvertes dans Google Android. Certaines d'entre elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur, une exécution de code arbitraire et une atteinte à la confidentialité des données. Solution Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité Android du 01 mars 2021 https://source.android.com/security/bulletin/2021-03-01 Bulletin de sécurité Pixel du 01 mars 2021 https://source.android.com/security/bulletin/pixel/2021-03-01 Référence CVE CVE-2017-14491 https://www.cve.org/CVERecord?id=CVE-2017-14491 Référence CVE CVE-2020-11165 https://www.cve.org/CVERecord?id=CVE-2020-11165 Référence CVE CVE-2020-11166 https://www.cve.org/CVERecord?id=CVE-2020-11166 Référence CVE CVE-2020-11171 https://www.cve.org/CVERecord?id=CVE-2020-11171 Référence CVE CVE-2020-11178 https://www.cve.org/CVERecord?id=CVE-2020-11178 Référence CVE CVE-2020-11186 https://www.cve.org/CVERecord?id=CVE-2020-11186 Référence CVE CVE-2020-11188 https://www.cve.org/CVERecord?id=CVE-2020-11188 Référence CVE CVE-2020-11189 https://www.cve.org/CVERecord?id=CVE-2020-11189 Référence CVE CVE-2020-11190 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2020-AVI-632Multiples vulnérabilités dans les produits Siemens

De multiples vulnérabilités ont été découvertes dans les produits Siemens. Elles permettent à un attaquant de provoquer une atteinte à l'intégrité des données et une atteinte à la confidentialité des données.

Official advisory ↗
CERT-FR · French · CERTFR-2017-AVI-362Multiples vulnérabilités dans NVIDIA Tegra Jetson L4T

Record?id=CVE-2017-0325 Référence CVE CVE-2017-0326 https://www.cve.org/CVERecord?id=CVE-2017-0326 Référence CVE CVE-2017-0327 https://www.cve.org/CVERecord?id=CVE-2017-0327 Référence CVE CVE-2017-0331 https://www.cve.org/CVERecord?id=CVE-2017-0331 Référence CVE CVE-2017-0332 https://www.cve.org/CVERecord?id=CVE-2017-0332 Référence CVE CVE-2017-0428 https://www.cve.org/CVERecord?id=CVE-2017-0428 Référence CVE CVE-2017-0429 https://www.cve.org/CVERecord?id=CVE-2017-0429 Référence CVE CVE-2017-1000250 https://www.cve.org/CVERecord?id=CVE-2017-1000250 Référence CVE CVE-2017-1000251 https://www.cve.org/CVERecord?id=CVE-2017-1000251 Référence CVE CVE-2017-14491 https://www.cve.org/CVERecord?id=CVE-2017-14491 Référence CVE CVE-2017-14492 https://www.cve.org/CVERecord?id=CVE-2017-14492 Référence CVE CVE-2017-14493 https://www.cve.org/CVERecord?id=CVE-2017-14493 Référence CVE CVE-2017-14494 https://www.cve.org/CVERecord?id=CVE-2017-14494 Référence CVE CVE-2017-14495 https://www.cve.org/CVERecord?id=CVE-2017-14495 Référence CVE CVE-2017-14496 https://www.cve.org/CVERecord?id=CVE-2017-14496 Référence CVE CVE-2017-6273 https://www.cve.org/CVERecord?id=CVE-2017-6273 Gestion détaillée du document le 18 octobre 2017 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À

Official advisory ↗
CERT-FR · French · CERTFR-2017-AVI-329Multiples vulnérabilités dans Dnsmasq

De multiples vulnérabilités ont été découvertes dans Dnsmasq . Elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et une atteinte à la confidentialité des données.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2017-008618dnsmasq における境界外書き込みに関する脆弱性

dnsmasq には、境界外書き込みに関する脆弱性が存在します。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2019-007414Dnsmasq における境界外読み取りに関する脆弱性

Dnsmasq には、境界外読み取りに関する脆弱性が存在します。 本脆弱性は、CVE-2017-14491 とは異なる脆弱性です。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-4801Dnsmasq 신규 취약점 보안 업데이트 권고

로컬 네트워크에서 익스플로잇될 수 있는 DNS Subsystem 원격 코드 실행 취약점 (CVE-2017-14491) [1]

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
n/a: n/a
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
A mitigation or workaround reference is available from the source linked below; validate it against the affected product and version.
04

Evidence and provenance

Published 2 Oct 2017 · Last source change 5 Aug 2024, 19:27 UTC · CWE-787 · Out-of-bounds Write

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-09-01
European sourceENISA EUVD · EUVD-2017-5994
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Vendor guidanceAuthoritative vendor guidance changed from vendor advisory to authoritative remediation link · mitigation, patch, vendor advisory.
    Before
    vendor advisory
    After
    authoritative remediation link · mitigation, patch, vendor advisory
    af854a3a-2127-422b-91ae-364da2661108 ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    n/a · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    n/a · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    CNA ↗
  3. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    af854a3a-2127-422b-91ae-364da2661108 ↗
  4. SeveritySeverity changed from Unknown to Critical.
    Before
    Unknown
    After
    Critical
    NIST NVD ↗
  5. CVSS scoreCVSS score changed from not recorded to 9.8 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
    Before
    not recorded
    After
    9.8 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
    NIST NVD ↗
  6. ENISA EUVD mappingEUVD-2017-5994 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2017-5994"}
    ENISA EUVD ↗
  7. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2017-5994↗Vendor advisory↗Patch or update reference↗Mitigation reference↗CVE authority or vendor reference↗Public exploit reference↗Public exploit reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2017-14491 · cve.blacktree.nl