dnsmasq: memory exhaustion vulnerability in the EDNS0 code
Published Oct 2, 2017
7.5
HIGHCVSS 3.0
EPSS 84.32%
Description
Memory leak in dnsmasq before 2.78, when the --add-mac, --add-cpe-id or --add-subnet option is specified, allows remote attackers to cause a denial of service (memory consumption) via vectors involving DNS response creation.
Affected products
No data.
Configuration 1
- 14.04
- 16.04
- 17.04
- 7.0
- 7.1
- 9.0
- 7.0
- 7.0
- 7.0
Configuration 2
- ≤ 2.77
No data.
Red Hat Enterprise Linux 7
dnsmasq-0:2.76-2.el7_4.2
Fixed · RHSA-2017:2836
Red Hat Enterprise Linux 5
dnsmasq
Not affected
Red Hat Enterprise Linux 6
dnsmasq
Not affected
Red Hat Enterprise Linux OpenStack Platform 6 (Juno)
dnsmasq
Not affected
Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)
dnsmasq
Not affected
Red Hat OpenStack Platform 10 (Newton)
dnsmasq
Not affected
Red Hat OpenStack Platform 11 (Ocata)
dnsmasq
Not affected
Red Hat OpenStack Platform 12 (Pike)
dnsmasq
Not affected
Red Hat OpenStack Platform 8 (Liberty)
dnsmasq
Not affected
Red Hat OpenStack Platform 9 (Mitaka)
dnsmasq
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | dnsmasq-0:2.76-2.el7_4.2 | Fixed | RHSA-2017:2836 |
| Red Hat Enterprise Linux 5 | dnsmasq | Not affected | n/a |
| Red Hat Enterprise Linux 6 | dnsmasq | Not affected | n/a |
| Red Hat Enterprise Linux OpenStack Platform 6 (Juno) | dnsmasq | Not affected | n/a |
| Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) | dnsmasq | Not affected | n/a |
| Red Hat OpenStack Platform 10 (Newton) | dnsmasq | Not affected | n/a |
| Red Hat OpenStack Platform 11 (Ocata) | dnsmasq | Not affected | n/a |
| Red Hat OpenStack Platform 12 (Pike) | dnsmasq | Not affected | n/a |
| Red Hat OpenStack Platform 8 (Liberty) | dnsmasq | Not affected | n/a |
| Red Hat OpenStack Platform 9 (Mitaka) | dnsmasq | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat OpenStack Platform includes the dnsmasq-utils RPM which does not contain this flaw's affected code-paths; Red Hat OpenStack Platform is therefore listed as not affected. However, 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 'yum update' or 'openstack overcloud update').
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (55 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 84.32% (0.84323) | 99.69th | v5 (v2026.06.15) |
| Sep 22, 2026 | 84.32% (0.84323) | 99.69th | v5 (v2026.06.15) |
| Sep 21, 2026 | 81.39% (0.81393) | 99.63th | v5 (v2026.06.15) |
| Sep 6, 2026 | 84.32% (0.84323) | 99.68th | v5 (v2026.06.15) |
| Sep 5, 2026 | 81.39% (0.81393) | 99.62th | v5 (v2026.06.15) |
| Aug 30, 2026 | 84.32% (0.84323) | 99.68th | v5 (v2026.06.15) |
| Aug 28, 2026 | 81.39% (0.81393) | 99.62th | v5 (v2026.06.15) |
| Aug 24, 2026 | 84.32% (0.84323) | 99.68th | v5 (v2026.06.15) |
| Aug 23, 2026 | 81.39% (0.81393) | 99.62th | v5 (v2026.06.15) |
| Jun 15, 2026 | 84.32% (0.84323) | 99.67th | v5 (v2026.06.15) |
| May 28, 2026 | 49.06% (0.49056) | 97.82th | v4 (v2025.03.14) |
| Mar 25, 2026 | 53.32% (0.53317) | 97.95th | v4 (v2025.03.14) |
| Mar 4, 2026 | 60.15% (0.60149) | 98.23th | v4 (v2025.03.14) |
| Mar 1, 2026 | 45.33% (0.45332) | 97.55th | v4 (v2025.03.14) |
| Feb 4, 2026 | 60.15% (0.60149) | 98.21th | v4 (v2025.03.14) |
| Feb 1, 2026 | 45.33% (0.45332) | 97.52th | v4 (v2025.03.14) |
| Jan 4, 2026 | 60.15% (0.60149) | 98.19th | v4 (v2025.03.14) |
| Jan 1, 2026 | 45.33% (0.45332) | 97.50th | v4 (v2025.03.14) |
| Dec 4, 2025 | 60.15% (0.60149) | 98.17th | v4 (v2025.03.14) |
| Dec 1, 2025 | 45.33% (0.45332) | 97.47th | v4 (v2025.03.14) |
| Nov 4, 2025 | 60.15% (0.60149) | 98.17th | v4 (v2025.03.14) |
| Nov 1, 2025 | 45.33% (0.45332) | 97.47th | v4 (v2025.03.14) |
| Oct 4, 2025 | 60.15% (0.60149) | 98.21th | v4 (v2025.03.14) |
| Oct 1, 2025 | 45.33% (0.45332) | 97.53th | v4 (v2025.03.14) |
| Sep 5, 2025 | 60.15% (0.60149) | 98.21th | v4 (v2025.03.14) |
| Sep 1, 2025 | 45.33% (0.45332) | 97.54th | v4 (v2025.03.14) |
| Aug 5, 2025 | 60.15% (0.60149) | 98.18th | v4 (v2025.03.14) |
| Aug 1, 2025 | 45.33% (0.45332) | 97.52th | v4 (v2025.03.14) |
| Jul 4, 2025 | 60.15% (0.60149) | 98.15th | v4 (v2025.03.14) |
| Jul 1, 2025 | 45.33% (0.45332) | 97.47th | v4 (v2025.03.14) |
| Jun 4, 2025 | 53.32% (0.53317) | 97.81th | v4 (v2025.03.14) |
| Jun 1, 2025 | 44.58% (0.44578) | 97.42th | v4 (v2025.03.14) |
| May 4, 2025 | 53.32% (0.53317) | 97.80th | v4 (v2025.03.14) |
| May 1, 2025 | 44.58% (0.44578) | 97.40th | v4 (v2025.03.14) |
| Mar 31, 2025 | 53.32% (0.53317) | 97.75th | v4 (v2025.03.14) |
| Mar 30, 2025 | 44.58% (0.44578) | 97.30th | v4 (v2025.03.14) |
| Mar 29, 2025 | 31.15% (0.31152) | 94.89th | v4 (v2025.03.14) |
| Mar 22, 2025 | 53.32% (0.53317) | 97.78th | v4 (v2025.03.14) |
| Mar 21, 2025 | 44.58% (0.44578) | 97.32th | v4 (v2025.03.14) |
| Mar 19, 2025 | 53.32% (0.53317) | 97.67th | v4 (v2025.03.14) |
| Mar 18, 2025 | 42.60% (0.42598) | 97.19th | v4 (v2025.03.14) |
| Mar 17, 2025 | 51.39% (0.51388) | 97.62th | v4 (v2025.03.14) |
| Dec 17, 2024 | 92.22% (0.92217) | 99.20th | v3 (v2023.03.01) |
| Jan 6, 2024 | 89.94% (0.89944) | 98.54th | v3 (v2023.03.01) |
| Nov 8, 2023 | 92.30% (0.92295) | 98.70th | v3 (v2023.03.01) |
| May 8, 2023 | 94.40% (0.94403) | 98.75th | v3 (v2023.03.01) |
| Apr 4, 2023 | 93.49% (0.93487) | 98.56th | v3 (v2023.03.01) |
| Mar 7, 2023 | 93.66% (0.93656) | 98.53th | v3 (v2023.03.01) |
| Mar 6, 2023 | 18.33% (0.18327) | 96.32th | v2 (v2022.01.01) |
| Apr 1, 2022 | 18.33% (0.18327) | 95.99th | v2 (v2022.01.01) |
| Feb 4, 2022 | 18.33% (0.18327) | 93.57th | v2 (v2022.01.01) |
| Feb 3, 2022 | 24.76% (0.24762) | 95.48th | v1 |
| Jan 6, 2022 | 24.76% (0.24762) | 95.43th | v1 |
| Sep 1, 2021 | 24.76% (0.24762) | 98.23th | v1 |
| Apr 14, 2021 | 24.76% (0.24762) | 0.00th | v1 |
References (25)
- http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00006.html vendor-advisoryx_refsource_SUSEIssue TrackingMailing ListThird Party Advisory
- http://nvidia.custhelp.com/app/answers/detail/a_id/4561 x_refsource_CONFIRM
- http://thekelleys.org.uk/dnsmasq/CHANGELOG x_refsource_CONFIRMRelease NotesVendor Advisory
- http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=51eadb692a5123b9838e5a68ecace3ac579a3a45 x_refsource_CONFIRM
- http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2017-005.txt x_refsource_CONFIRM
- http://www.debian.org/security/2017/dsa-3989 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.securityfocus.com/bid/101085 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securityfocus.com/bid/101977 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1039474 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-3430-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-3430-2 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2836 vendor-advisoryx_refsource_REDHATPatchThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-14495 Vendor Advisory
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- https://bugzilla.redhat.com/show_bug.cgi?id=1495415 Issue Tracking
- https://cert-portal.siemens.com/productcert/pdf/ssa-689071.pdf x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2017-14495
- https://security.gentoo.org/glsa/201710-27 vendor-advisoryx_refsource_GENTOO
- https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html x_refsource_MISCThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2017-14495
- https://www.exploit-db.com/exploits/42945/ exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry
- https://www.kb.cert.org/vuls/id/973527 third-party-advisoryx_refsource_CERT-VNThird Party AdvisoryUS Government Resource
- https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11664.html mailing-listx_refsource_MLIST
- https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11665.html mailing-listx_refsource_MLIST
- https://www.synology.com/support/security/Synology_SA_17_59_Dnsmasq x_refsource_CONFIRM
Change history (0)
No recorded changes yet.