tcpdump: Infinite loop due to a bug in print-lldp.c:lldp_private_8021_print() in LLDP parser
Published Sep 14, 2017
9.8
CRITICALCVSS 3.1
EPSS 2.46%
Description
The LLDP parser in tcpdump before 4.9.2 could enter an infinite loop due to a bug in print-lldp.c:lldp_private_8021_print().
Affected products
No data.
No data.
Red Hat Enterprise Linux 7
tcpdump-14:4.9.2-3.el7
Fixed · RHEA-2018:0705
Red Hat Enterprise Linux 5
tcpdump
Will not fix
Red Hat Enterprise Linux 6
tcpdump
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | tcpdump-14:4.9.2-3.el7 | Fixed | RHEA-2018:0705 |
| Red Hat Enterprise Linux 5 | tcpdump | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | tcpdump | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Dec 4, 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
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.46% (0.02463) | 83.88th | v5 (v2026.06.15) |
| Sep 20, 2026 | 2.46% (0.02463) | 83.73th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.93% (0.00932) | 83.19th | v3 (v2023.03.01) |
| Mar 19, 2024 | 0.93% (0.00932) | 82.63th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.93% (0.00934) | 80.62th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.18% (0.01183) | 61.76th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.18% (0.01183) | 35.15th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.86% (0.01865) | 48.06th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.86% (0.01865) | 0.00th | v1 |
References (12)
- http://www.debian.org/security/2017/dsa-3971 vendor-advisoryx_refsource_DEBIAN
- http://www.securityfocus.com/bid/100914 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1039307 vdb-entryx_refsource_SECTRACK
- http://www.tcpdump.org/tcpdump-changes.txt x_refsource_CONFIRMVendor Advisory
- https://access.redhat.com/errata/RHEA-2018:0705 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2017-12997 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1490564 Issue Tracking
- https://github.com/the-tcpdump-group/tcpdump/commit/34cec721d39c76be1e0a600829a7b17bdfb832b6 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-12997
- https://security.gentoo.org/glsa/201709-23 vendor-advisoryx_refsource_GENTOO
- https://support.apple.com/HT208221 x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2017-12997
| Link | Providers | Tags |
|---|---|---|
| http://www.debian.org/security/2017/dsa-3971 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.securityfocus.com/bid/100914 | vdb-entryx_refsource_BID | |
| http://www.securitytracker.com/id/1039307 | vdb-entryx_refsource_SECTRACK | |
| http://www.tcpdump.org/tcpdump-changes.txt | x_refsource_CONFIRMVendor Advisory | |
| https://access.redhat.com/errata/RHEA-2018:0705 | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/security/cve/CVE-2017-12997 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1490564 | Issue Tracking | |
| https://github.com/the-tcpdump-group/tcpdump/commit/34cec721d39c76be1e0a600829a7b17bdfb832b6 | x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-12997 | ||
| https://security.gentoo.org/glsa/201709-23 | vendor-advisoryx_refsource_GENTOO | |
| https://support.apple.com/HT208221 | x_refsource_CONFIRM | |
| https://www.cve.org/CVERecord?id=CVE-2017-12997 |
Change history (0)
No recorded changes yet.