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CVE-2017-14493

Status Candidate

Overview

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.

Related Files

Ubuntu Security Notice USN-3430-3
Posted Jan 4, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3430-3 - USN-3430-2 fixed several vulnerabilities. The update introduced a new regression that breaks DNS resolution. This update addresses the problem. Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher discovered that Dnsmasq incorrectly handled DNS requests. A remote attacker could use this issue to cause Dnsmasq to crash, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-14491, CVE-2017-14492, CVE-2017-14493, CVE-2017-14494, CVE-2017-14495, CVE-2017-14496
SHA-256 | ee378bb57645a2d84370aab4dc638233e21bb225bd62f15b9bfc37f646a1ded4
Gentoo Linux Security Advisory 201710-27
Posted Oct 23, 2017
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201710-27 - Multiple vulnerabilities have been found in Dnsmasq, the worst of which may allow remote attackers to execute arbitrary code. Versions less than 2.78 are affected.

tags | advisory, remote, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2017-14491, CVE-2017-14492, CVE-2017-14493, CVE-2017-14494, CVE-2017-14495, CVE-2017-14496
SHA-256 | 38689f62169ad9727d20db758cda09ebd860a0cf445ff581a92ce63c5f6b096a
Ubuntu Security Notice USN-3430-2
Posted Oct 3, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3430-2 - USN-3430-1 fixed several vulnerabilities in Dnsmasq. This update provides the corresponding update for Ubuntu 12.04 ESM. A Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher A discovered that Dnsmasq incorrectly handled DNS requests. A remote A attacker could use this issue to cause Dnsmasq to crash, resulting in A a denial of service, or possibly execute arbitrary code.A A Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-14491, CVE-2017-14492, CVE-2017-14493, CVE-2017-14494, CVE-2017-14495, CVE-2017-14496
SHA-256 | af47e78fbed8bea2d0e91ae18d941fe35ccaff045fd6e05faf0764d15c245741
Red Hat Security Advisory 2017-2836-01
Posted Oct 3, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2836-01 - The dnsmasq packages contain Dnsmasq, a lightweight DNS forwarder and DHCP server. Security Fix: A heap buffer overflow was found in dnsmasq in the code responsible for building DNS replies. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. A heap buffer overflow was discovered in dnsmasq in the IPv6 router advertisement handling code. An attacker on the local network segment could send crafted RAs to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. This issue only affected configurations using one of these options: enable-ra, ra-only, slaac, ra-names, ra-advrouter, or ra-stateless.

tags | advisory, overflow, arbitrary, local
systems | linux, redhat
advisories | CVE-2017-14491, CVE-2017-14492, CVE-2017-14493, CVE-2017-14494, CVE-2017-14495, CVE-2017-14496
SHA-256 | 40f38afa9a7156950ba15636b6a23e5643072a5975f5c5d66d3df49b270e25fd
Ubuntu Security Notice USN-3430-1
Posted Oct 2, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3430-1 - Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher discovered that Dnsmasq incorrectly handled DNS requests. A remote attacker could use this issue to cause Dnsmasq to crash, resulting in a denial of service, or possibly execute arbitrary code. Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher discovered that Dnsmasq incorrectly handled IPv6 router advertisements. A remote attacker could use this issue to cause Dnsmasq to crash, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2017-14491, CVE-2017-14492, CVE-2017-14493, CVE-2017-14494, CVE-2017-14495, CVE-2017-14496
SHA-256 | 3dad4acf0720be09289a42b685e45cc126f0c1cade57b137c68ab5283ae43c49
Red Hat Security Advisory 2017-2837-01
Posted Oct 2, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2837-01 - The dnsmasq packages contain Dnsmasq, a lightweight DNS forwarder and DHCP server. Security Fix: A heap buffer overflow was found in dnsmasq in the code responsible for building DNS replies. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. A heap buffer overflow was discovered in dnsmasq in the IPv6 router advertisement handling code. An attacker on the local network segment could send crafted RAs to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. This issue only affected configurations using one of these options: enable-ra, ra-only, slaac, ra-names, ra-advrouter, or ra-stateless.

tags | advisory, overflow, arbitrary, local
systems | linux, redhat
advisories | CVE-2017-14491, CVE-2017-14492, CVE-2017-14493, CVE-2017-14494
SHA-256 | 90869c50cad4aa9014f75fd6b9307d81979a791208e043f504a417a1e7001350
Dnsmasq Stack-Based Overflow
Posted Oct 2, 2017
Authored by Google Security Research

Dnsmasq versions prior to 2.78 suffer from a stack-based overflow vulnerability.

tags | exploit, overflow
advisories | CVE-2017-14493
SHA-256 | e7693a6364ec3a51db0e94faef739843f2a7346005d5ab1cbade5c4cd89335da
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