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    CVE-2017-14493

    Stack-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 DHCPv6 request.

    Published:Oct 2, 2017
    Last Modified:Apr 20, 2025
    EPS:Oct 2, 2017
    EPSS Score:0.05615
    CVSS Score:9.8

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Opensuse
    Product
    Leap
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Desktop
    Vendor
    Redhat
    Product
    Enterprise Linux Server
    Vendor
    Redhat
    Product
    Enterprise Linux Workstation
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Thekelleys
    Product
    Dnsmasq

    Exploits

    https://www.exploit-db.com/exploits/42943/https://www.exploit-db.com/exploits/42943/https://www.exploit-db.com/exploits/42943https://github.com/pupiles/bof-dnsmasq-cve-2017-14493

    Related CVEs

    CVE-2026-13476 (CVSS 7.3) — IBM Informix Dynamic Server 14.10, 15.0, and 12.10 could allow an unauthenticated user to execute arbitrary co…
    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    References

    http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00006.html
    http://nvidia.custhelp.com/app/answers/detail/a_id/4561
    http://thekelleys.org.uk/dnsmasq/CHANGELOG
    http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=3d4ff1ba8419546490b464418223132529514033
    http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2017-005.txt
    http://www.debian.org/security/2017/dsa-3989
    http://www.securityfocus.com/bid/101085
    http://www.securitytracker.com/id/1039474
    http://www.ubuntu.com/usn/USN-3430-1
    http://www.ubuntu.com/usn/USN-3430-2
    https://access.redhat.com/errata/RHSA-2017:2836
    https://access.redhat.com/errata/RHSA-2017:2837
    https://access.redhat.com/security/vulnerabilities/3199382
    https://security.gentoo.org/glsa/201710-27
    https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html
    https://www.exploit-db.com/exploits/42943/
    https://www.kb.cert.org/vuls/id/973527
    https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11664.html
    https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11665.html
    https://www.synology.com/support/security/Synology_SA_17_59_Dnsmasq
    http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00006.html
    http://nvidia.custhelp.com/app/answers/detail/a_id/4561
    http://thekelleys.org.uk/dnsmasq/CHANGELOG
    http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=3d4ff1ba8419546490b464418223132529514033
    http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2017-005.txt
    http://www.debian.org/security/2017/dsa-3989
    http://www.securityfocus.com/bid/101085
    http://www.securitytracker.com/id/1039474
    http://www.ubuntu.com/usn/USN-3430-1
    http://www.ubuntu.com/usn/USN-3430-2
    https://access.redhat.com/errata/RHSA-2017:2836
    https://access.redhat.com/errata/RHSA-2017:2837
    https://access.redhat.com/security/vulnerabilities/3199382
    https://security.gentoo.org/glsa/201710-27
    https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html
    https://www.exploit-db.com/exploits/42943/
    https://www.kb.cert.org/vuls/id/973527
    https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11664.html
    https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11665.html
    https://www.synology.com/support/security/Synology_SA_17_59_Dnsmasq

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High