tcpdump: Access to uninitialized buffer in print_prefix() function in print-hncp.c
Published Oct 3, 2019
9.8
CRITICALCVSS 3.1
EPSS 3.74%
Description
The HNCP parser in tcpdump before 4.9.3 has a buffer over-read in print-hncp.c:print_prefix().
Affected products
No data.
Configuration 2
- < 10.15.2
- 8.0
- 9.0
- 10.0
- 29
- 30
- 31
- 15.0
- 15.1
- 7.0
- 8.0
No data.
Red Hat Enterprise Linux 8
tcpdump-14:4.9.3-1.el8
Fixed · RHSA-2020:4760
Red Hat Enterprise Linux 5
tcpdump
Out of support scope
Red Hat Enterprise Linux 6
tcpdump
Out of support scope
Red Hat Enterprise Linux 7
tcpdump
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | tcpdump-14:4.9.3-1.el8 | Fixed | RHSA-2020:4760 |
| Red Hat Enterprise Linux 5 | tcpdump | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | tcpdump | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | tcpdump | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the versions of tcpdump as shipped with Red Hat Enterprise Linux 7 as they already include the patch.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (CISA ADP) ▾
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Dec 3, 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 v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.74% (0.03739) | 89.50th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.74% (0.03739) | 88.40th | v5 (v2026.06.15) |
| Mar 30, 2025 | 2.23% (0.02230) | 83.04th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.34% (0.03337) | 78.62th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.23% (0.02230) | 83.36th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.33% (0.00329) | 71.28th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.33% (0.00329) | 70.18th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.33% (0.00327) | 66.18th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.69% (0.02686) | 81.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.69% (0.02686) | 62.66th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.52% (0.00524) | 12.57th | v1 |
| Jan 6, 2022 | 0.52% (0.00524) | 12.12th | v1 |
| Sep 1, 2021 | 0.52% (0.00524) | 32.30th | v1 |
| Apr 14, 2021 | 0.52% (0.00524) | 0.00th | v1 |
References (20)
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00050.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00053.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://seclists.org/fulldisclosure/2019/Dec/26 mailing-listx_refsource_FULLDISCMailing ListThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-16228 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1760514 Issue Tracking
- https://github.com/the-tcpdump-group/tcpdump/blob/tcpdump-4.9/CHANGES x_refsource_MISCRelease NotesThird Party Advisory
- https://github.com/the-tcpdump-group/tcpdump/commit/83a412a5275cac973c5841eca3511c766bed778d x_refsource_CONFIRMPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00015.html mailing-listx_refsource_MLISTThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62XY42U6HY3H2APR5EHNWCZ7SAQNMMJN/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNYXF3IY2X65IOD422SA6EQUULSGW7FN/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R2UDPOSGVJQIYC33SQBXMDXHH4QDSDMU/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2018-16228
- https://seclists.org/bugtraq/2019/Dec/23 mailing-listx_refsource_BUGTRAQMailing ListThird Party Advisory
- https://seclists.org/bugtraq/2019/Oct/28 mailing-listx_refsource_BUGTRAQMailing ListThird Party Advisory
- https://security.netapp.com/advisory/ntap-20200120-0001/ x_refsource_CONFIRM
- https://support.apple.com/kb/HT210788 x_refsource_CONFIRMThird Party Advisory
- https://usn.ubuntu.com/4252-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4252-2/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2018-16228
- https://www.debian.org/security/2019/dsa-4547 vendor-advisoryx_refsource_DEBIANThird Party Advisory
Change history (0)
No recorded changes yet.