rhsa-2017_2836
Vulnerability from csaf_redhat
Published
2017-10-02 17:18
Modified
2024-11-05 20:13
Summary
Red Hat Security Advisory: dnsmasq security update
Notes
Topic
An update for dnsmasq is now available for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server.
Security Fix(es):
* 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)
* 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)
* 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)
* 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)
* 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)
* 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)
Red Hat would like to thank Felix Wilhelm (Google Security Team), Fermin J. Serna (Google Security Team), Gabriel Campana (Google Security Team), Kevin Hamacher (Google Security Team), and Ron Bowes (Google Security Team) for reporting these issues.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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"names": [
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"Fermin J. Serna",
"Gabriel Campana",
"Kevin Hamacher",
"Ron Bowes"
],
"organization": "Google Security Team"
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"text": "1495409"
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"text": "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.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "dnsmasq: heap overflow in the code responsible for building DNS replies",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat OpenStack Platform includes the dnsmasq-utils RPM which does not contain this flaw\u0027s affected code-paths; Red Hat OpenStack Platform is therefore listed as not affected.\n\nHowever, because all versions of Red Hat OpenStack Platform are based on Red Hat Enterprise Linux, all Red Hat OpenStack Platform users should absolutely upgrade the dnsmasq RPM from Red Hat Enterprise Linux as a matter of urgency using standard update mechanisms (such as \u0027yum update\u0027 or \u0027openstack overcloud update\u0027).",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2017-14491"
},
{
"category": "external",
"summary": "RHBZ#1495409",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1495409"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2017-14491",
"url": "https://www.cve.org/CVERecord?id=CVE-2017-14491"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2017-14491",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14491"
},
{
"category": "external",
"summary": "https://access.redhat.com/security/vulnerabilities/3199382",
"url": "https://access.redhat.com/security/vulnerabilities/3199382"
},
{
"category": "external",
"summary": "https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html",
"url": "https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html"
}
],
"release_date": "2017-10-02T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2017-10-02T17:18:46+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2017:2836"
}
],
"scores": [
{
"cvss_v2": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 10.0,
"confidentialityImpact": "COMPLETE",
"integrityImpact": "COMPLETE",
"vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
"version": "2.0"
},
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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}
],
"threats": [
{
"category": "impact",
"details": "Critical"
}
],
"title": "dnsmasq: heap overflow in the code responsible for building DNS replies"
},
{
"acknowledgments": [
{
"names": [
"Felix Wilhelm",
"Fermin J. Serna",
"Gabriel Campana",
"Kevin Hamacher",
"Ron Bowes"
],
"organization": "Google Security Team"
}
],
"cve": "CVE-2017-14492",
"cwe": {
"id": "CWE-122",
"name": "Heap-based Buffer Overflow"
},
"discovery_date": "2017-09-25T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1495410"
}
],
"notes": [
{
"category": "description",
"text": "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.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "dnsmasq: heap overflow in the IPv6 router advertisement code",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat OpenStack Platform includes the dnsmasq-utils RPM which does not contain this flaw\u0027s affected code-paths; Red Hat OpenStack Platform is therefore listed as not affected.\n\nHowever, because all versions of Red Hat OpenStack Platform are based on Red Hat Enterprise Linux, all Red Hat OpenStack Platform users should absolutely upgrade the dnsmasq RPM from Red Hat Enterprise Linux as a matter of urgency using standard update mechanisms (such as \u0027yum update\u0027 or \u0027openstack overcloud update\u0027).",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2017-14492"
},
{
"category": "external",
"summary": "RHBZ#1495410",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1495410"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2017-14492",
"url": "https://www.cve.org/CVERecord?id=CVE-2017-14492"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2017-14492",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14492"
},
{
"category": "external",
"summary": "https://access.redhat.com/security/vulnerabilities/3199382",
"url": "https://access.redhat.com/security/vulnerabilities/3199382"
},
{
"category": "external",
"summary": "https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html",
"url": "https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html"
}
],
"release_date": "2017-10-02T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2017-10-02T17:18:46+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
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},
"url": "https://access.redhat.com/errata/RHSA-2017:2836"
}
],
"scores": [
{
"cvss_v2": {
"accessComplexity": "LOW",
"accessVector": "ADJACENT_NETWORK",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 8.3,
"confidentialityImpact": "COMPLETE",
"integrityImpact": "COMPLETE",
"vectorString": "AV:A/AC:L/Au:N/C:C/I:C/A:C",
"version": "2.0"
},
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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}
],
"threats": [
{
"category": "impact",
"details": "Critical"
}
],
"title": "dnsmasq: heap overflow in the IPv6 router advertisement code"
},
{
"acknowledgments": [
{
"names": [
"Felix Wilhelm",
"Fermin J. Serna",
"Gabriel Campana",
"Kevin Hamacher",
"Ron Bowes"
],
"organization": "Google Security Team"
}
],
"cve": "CVE-2017-14493",
"cwe": {
"id": "CWE-121",
"name": "Stack-based Buffer Overflow"
},
"discovery_date": "2017-09-25T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1495411"
}
],
"notes": [
{
"category": "description",
"text": "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.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "dnsmasq: stack buffer overflow in the DHCPv6 code",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat OpenStack Platform includes the dnsmasq-utils RPM which does not contain this flaw\u0027s affected code-paths; Red Hat OpenStack Platform is therefore listed as not affected.\n\nHowever, because all versions of Red Hat OpenStack Platform are based on Red Hat Enterprise Linux, all Red Hat OpenStack Platform users should absolutely upgrade the dnsmasq RPM from Red Hat Enterprise Linux as a matter of urgency using standard update mechanisms (such as \u0027yum update\u0027 or \u0027openstack overcloud update\u0027).",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2017-14493"
},
{
"category": "external",
"summary": "RHBZ#1495411",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1495411"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2017-14493",
"url": "https://www.cve.org/CVERecord?id=CVE-2017-14493"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2017-14493",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14493"
},
{
"category": "external",
"summary": "https://access.redhat.com/security/vulnerabilities/3199382",
"url": "https://access.redhat.com/security/vulnerabilities/3199382"
},
{
"category": "external",
"summary": "https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html",
"url": "https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html"
}
],
"release_date": "2017-10-02T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2017-10-02T17:18:46+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2017:2836"
}
],
"scores": [
{
"cvss_v2": {
"accessComplexity": "LOW",
"accessVector": "ADJACENT_NETWORK",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 8.3,
"confidentialityImpact": "COMPLETE",
"integrityImpact": "COMPLETE",
"vectorString": "AV:A/AC:L/Au:N/C:C/I:C/A:C",
"version": "2.0"
},
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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}
],
"threats": [
{
"category": "impact",
"details": "Critical"
}
],
"title": "dnsmasq: stack buffer overflow in the DHCPv6 code"
},
{
"acknowledgments": [
{
"names": [
"Felix Wilhelm",
"Fermin J. Serna",
"Gabriel Campana",
"Kevin Hamacher",
"Ron Bowes"
],
"organization": "Google Security Team"
}
],
"cve": "CVE-2017-14494",
"cwe": {
"id": "CWE-125",
"name": "Out-of-bounds Read"
},
"discovery_date": "2017-09-25T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1495412"
}
],
"notes": [
{
"category": "description",
"text": "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.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "dnsmasq: information leak in the DHCPv6 relay code",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat OpenStack Platform includes the dnsmasq-utils RPM which does not contain this flaw\u0027s affected code-paths; Red Hat OpenStack Platform is therefore listed as not affected.\n\nHowever, because all versions of Red Hat OpenStack Platform are based on Red Hat Enterprise Linux, all Red Hat OpenStack Platform users should absolutely upgrade the dnsmasq RPM from Red Hat Enterprise Linux as a matter of urgency using standard update mechanisms (such as \u0027yum update\u0027 or \u0027openstack overcloud update\u0027).",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2017-14494"
},
{
"category": "external",
"summary": "RHBZ#1495412",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1495412"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2017-14494",
"url": "https://www.cve.org/CVERecord?id=CVE-2017-14494"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2017-14494",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14494"
},
{
"category": "external",
"summary": "https://access.redhat.com/security/vulnerabilities/3199382",
"url": "https://access.redhat.com/security/vulnerabilities/3199382"
},
{
"category": "external",
"summary": "https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html",
"url": "https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html"
}
],
"release_date": "2017-10-02T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2017-10-02T17:18:46+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2017:2836"
}
],
"scores": [
{
"cvss_v2": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 7.8,
"confidentialityImpact": "COMPLETE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:C/I:N/A:N",
"version": "2.0"
},
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.0"
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],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "dnsmasq: information leak in the DHCPv6 relay code"
},
{
"acknowledgments": [
{
"names": [
"Felix Wilhelm",
"Fermin J. Serna",
"Gabriel Campana",
"Kevin Hamacher",
"Ron Bowes"
],
"organization": "Google Security Team"
}
],
"cve": "CVE-2017-14495",
"cwe": {
"id": "CWE-400",
"name": "Uncontrolled Resource Consumption"
},
"discovery_date": "2017-09-25T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1495415"
}
],
"notes": [
{
"category": "description",
"text": "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.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "dnsmasq: memory exhaustion vulnerability in the EDNS0 code",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat OpenStack Platform includes the dnsmasq-utils RPM which does not contain this flaw\u0027s affected code-paths; Red Hat OpenStack Platform is therefore listed as not affected.\n\nHowever, because all versions of Red Hat OpenStack Platform are based on Red Hat Enterprise Linux, all Red Hat OpenStack Platform users should absolutely upgrade the dnsmasq RPM from Red Hat Enterprise Linux as a matter of urgency using standard update mechanisms (such as \u0027yum update\u0027 or \u0027openstack overcloud update\u0027).",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2017-14495"
},
{
"category": "external",
"summary": "RHBZ#1495415",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1495415"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2017-14495",
"url": "https://www.cve.org/CVERecord?id=CVE-2017-14495"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2017-14495",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14495"
},
{
"category": "external",
"summary": "https://access.redhat.com/security/vulnerabilities/3199382",
"url": "https://access.redhat.com/security/vulnerabilities/3199382"
},
{
"category": "external",
"summary": "https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html",
"url": "https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html"
}
],
"release_date": "2017-10-02T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2017-10-02T17:18:46+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2017:2836"
}
],
"scores": [
{
"cvss_v2": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 7.8,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
"version": "2.0"
},
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.0"
},
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],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "dnsmasq: memory exhaustion vulnerability in the EDNS0 code"
},
{
"acknowledgments": [
{
"names": [
"Felix Wilhelm",
"Fermin J. Serna",
"Gabriel Campana",
"Kevin Hamacher",
"Ron Bowes"
],
"organization": "Google Security Team"
}
],
"cve": "CVE-2017-14496",
"cwe": {
"id": "CWE-125",
"name": "Out-of-bounds Read"
},
"discovery_date": "2017-09-25T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1495416"
}
],
"notes": [
{
"category": "description",
"text": "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.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "dnsmasq: integer underflow leading to buffer over-read in the EDNS0 code",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat OpenStack Platform includes the dnsmasq-utils RPM which does not contain this flaw\u0027s affected code-paths; Red Hat OpenStack Platform is therefore listed as not affected.\n\nHowever, because all versions of Red Hat OpenStack Platform are based on Red Hat Enterprise Linux, all Red Hat OpenStack Platform users should absolutely upgrade the dnsmasq RPM from Red Hat Enterprise Linux as a matter of urgency using standard update mechanisms (such as \u0027yum update\u0027 or \u0027openstack overcloud update\u0027).",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2017-14496"
},
{
"category": "external",
"summary": "RHBZ#1495416",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1495416"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2017-14496",
"url": "https://www.cve.org/CVERecord?id=CVE-2017-14496"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2017-14496",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14496"
},
{
"category": "external",
"summary": "https://access.redhat.com/security/vulnerabilities/3199382",
"url": "https://access.redhat.com/security/vulnerabilities/3199382"
},
{
"category": "external",
"summary": "https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html",
"url": "https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html"
}
],
"release_date": "2017-10-02T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2017-10-02T17:18:46+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2017:2836"
}
],
"scores": [
{
"cvss_v2": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 7.8,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
"version": "2.0"
},
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.0"
},
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "dnsmasq: integer underflow leading to buffer over-read in the EDNS0 code"
}
]
}
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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.