9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
0.923 High
EPSS
Percentile
98.9%
Issue Overview:
Information leak in the DHCPv6 relay code
An information leak was found in dnsmasq in the DHCPv6 relay code. An attacker on the local network could send crafted DHCPv6 packets to dnsmasq causing it to forward the contents of process memory, potentially leaking sensitive data. (CVE-2017-14494)
Memory exhaustion vulnerability in the EDNS0 code
A memory exhaustion flaw was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets which would trigger memory allocations which would never be freed, leading to unbounded memory consumption and eventually a crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet. (CVE-2017-14495)
Integer underflow leading to buffer over-read in the EDNS0 code
An integer underflow flaw leading to a buffer over-read was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet. (CVE-2017-14496)
Heap overflow in the code responsible for building DNS replies
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. (CVE-2017-14491)
Heap overflow in the IPv6 router advertisement code
A heap buffer overflow was discovered in dnsmasq in the IPv6 router advertisement (RA) 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. (CVE-2017-14492)
Stack buffer overflow in the DHCPv6 code
A stack buffer overflow was found in dnsmasq in the DHCPv6 code. An attacker on the local network could send a crafted DHCPv6 request to dnsmasq which would cause it to a crash or, potentially, execute arbitrary code. (CVE-2017-14493)
Affected Packages:
dnsmasq
Issue Correction:
Run yum update dnsmasq to update your system.
New Packages:
i686:
dnsmasq-2.76-2.14.amzn1.i686
dnsmasq-debuginfo-2.76-2.14.amzn1.i686
dnsmasq-utils-2.76-2.14.amzn1.i686
src:
dnsmasq-2.76-2.14.amzn1.src
x86_64:
dnsmasq-utils-2.76-2.14.amzn1.x86_64
dnsmasq-debuginfo-2.76-2.14.amzn1.x86_64
dnsmasq-2.76-2.14.amzn1.x86_64
Red Hat: CVE-2017-14491, CVE-2017-14492, CVE-2017-14493, CVE-2017-14494, CVE-2017-14495, CVE-2017-14496
Mitre: CVE-2017-14491, CVE-2017-14492, CVE-2017-14493, CVE-2017-14494, CVE-2017-14495, CVE-2017-14496
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 1 | i686 | dnsmasq | < 2.76-2.14.amzn1 | dnsmasq-2.76-2.14.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | dnsmasq-debuginfo | < 2.76-2.14.amzn1 | dnsmasq-debuginfo-2.76-2.14.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | dnsmasq-utils | < 2.76-2.14.amzn1 | dnsmasq-utils-2.76-2.14.amzn1.i686.rpm |
Amazon Linux | 1 | x86_64 | dnsmasq-utils | < 2.76-2.14.amzn1 | dnsmasq-utils-2.76-2.14.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | dnsmasq-debuginfo | < 2.76-2.14.amzn1 | dnsmasq-debuginfo-2.76-2.14.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | dnsmasq | < 2.76-2.14.amzn1 | dnsmasq-2.76-2.14.amzn1.x86_64.rpm |
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
0.923 High
EPSS
Percentile
98.9%