Out-of-Bounds write in systemd-networkd dhcpv6 option handling
Published Oct 26, 2018
8.8
HIGHCVSS 3.1
EPSS 1.67%
Description
A buffer overflow vulnerability in the dhcp6 client of systemd allows a malicious dhcp6 server to overwrite heap memory in systemd-networkd. Affected releases are systemd: versions up to and including 239.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<=239
- Version
Configuration 1
- ≤ 239
Configuration 2
- 8.0
Configuration 3
- 16.04
- 18.04
- 18.10
Configuration 4
- 7.0
- 7.0
- 7.6
- 7.6
- 7.6
- 7.0
No data.
Red Hat Enterprise Linux 7
NetworkManager-1:1.12.0-8.el7_6
Fixed · RHSA-2018:3665
Red Hat Enterprise Linux 7
systemd-0:219-62.el7_6.2
Fixed · RHSA-2019:0049
Red Hat Enterprise Linux 5
NetworkManager
Not affected
Red Hat Enterprise Linux 6
NetworkManager
Not affected
Red Hat Enterprise Linux 8
NetworkManager
Not affected
Red Hat Enterprise Linux 8
systemd
Not affected
Red Hat Virtualization 4
redhat-virtualization-host
Not affected
Red Hat Virtualization 4
rhvm-appliance
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | NetworkManager-1:1.12.0-8.el7_6 | Fixed | RHSA-2018:3665 |
| Red Hat Enterprise Linux 7 | systemd-0:219-62.el7_6.2 | Fixed | RHSA-2019:0049 |
| Red Hat Enterprise Linux 5 | NetworkManager | Not affected | n/a |
| Red Hat Enterprise Linux 6 | NetworkManager | Not affected | n/a |
| Red Hat Enterprise Linux 8 | NetworkManager | Not affected | n/a |
| Red Hat Enterprise Linux 8 | systemd | Not affected | n/a |
| Red Hat Virtualization 4 | redhat-virtualization-host | Not affected | n/a |
| Red Hat Virtualization 4 | rhvm-appliance | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects the versions of systemd-networkd as shipped with Red Hat Enterprise Linux 7, however the package is available only through the unsupported Optional repository and it cannot be exploited unless the interface is explicitly configured to use DHCP. This issue affects the versions of NetworkManager as shipped with Red Hat Enterprise Linux 7 because the package includes some parts of the systemd-networkd code, which present the same vulnerability. NetworkManager is vulnerable to this flaw only when configured to use the internal DHCP, which is not the default. However, when it is, the flaw may be triggered by a connection where either ipv6.method is set to dhcp or it is set to auto, which is the default value.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:A/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Jun 9, 2025 · SSVC 2.0.3
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 v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.67% (0.01666) | 75.89th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.68% (0.01680) | 73.85th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.84% (0.00845) | 73.17th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.31% (0.00311) | 70.93th | v3 (v2023.03.01) |
| Apr 26, 2024 | 0.31% (0.00311) | 69.74th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.29% (0.00287) | 67.96th | v3 (v2023.03.01) |
| Oct 20, 2023 | 0.29% (0.00287) | 65.26th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.25% (0.00247) | 60.77th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.54% (0.01537) | 51.33th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.07% (0.02069) | 50.36th | v5 (v2026.06.15) |
| Apr 14, 2021 | 2.07% (0.02069) | 0.00th | v1 |
References (13)
- http://www.securityfocus.com/bid/105745 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHBA-2019:0327 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3665 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0049 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-15688 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1639067 Issue Tracking
- https://github.com/systemd/systemd/pull/10518 x_refsource_MISCPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00017.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-15688
- https://security.gentoo.org/glsa/201810-10 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://usn.ubuntu.com/3806-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3807-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-15688
Change history (0)
No recorded changes yet.