In tcpdump 4.9.2, a stack-based buffer over-read exists in the print_prefix function of…
Priority LOW 30CWE-125Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-125 and the CVSS impact.
Summary
In tcpdump 4.9.2, a stack-based buffer over-read exists in the print_prefix function of print-hncp.c via crafted packet data because of missing initialization.
Why it matters now
EPSS 0.02586 85th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 2 advisories
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:tcpdump:tcpdump:4.9.2:*:*:*:*:*:*:* | 4.9.2 | Vulnerable | The Tcpdump Group |
- cpe:2.3:a:tcpdump:tcpdump:4.9.2:*:*:*:*:*:*:* Versions 4.9.2 Vulnerable ·The Tcpdump Group
Remediation
Red Hat 2 advisories
- RHSA-2020:1604 Released 2020-04-28 · Red Hat rating Lowtcpdump security update
- Red Hat Enterprise Linux AppStream (v. 8) tcpdump-14:4.9.2-6.el8
- RHSA-2019:3976 Released 2019-11-26 · Red Hat rating Lowtcpdump security update
- Red Hat Enterprise Linux Client (v. 7) tcpdump-14:4.9.2-4.el7_7.1
- Red Hat Enterprise Linux ComputeNode (v. 7) tcpdump-14:4.9.2-4.el7_7.1
- Red Hat Enterprise Linux Server (v. 7) tcpdump-14:4.9.2-4.el7_7.1
- Red Hat Enterprise Linux Workstation (v. 7) tcpdump-14:4.9.2-4.el7_7.1
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2020:1604 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2019:3976 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2019:3976 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2019:3976 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2019:3976 |
Not affected: 2 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2018-19519
- 2026-10-03 Alias added: GHSA-7252-xx9j-xr4g
References
More The Tcpdump Group Tcpdump vulnerabilities
- TI-2007-03684 Integer overflow in print-bgp.c in the BGP dissector in tcpdump 3.9.6 and earlier allows… CVSS 3.1CRITICAL 9.8
- TI-2004-00159 Integer underflow in the isakmp_id_print for TCPDUMP 3.8.1 and earlier allows remote… CVSS 2.0MEDIUM 5.0
- TI-2018-10700 The BGP parser in tcpdump before 4.9.3 has a buffer over-read in… CVSS 3.1CRITICAL 9.8
- TI-2017-09693 The RPKI-Router parser in tcpdump before 4.9.2 has a buffer over-read in print-rpki-rtr.c:rpki_rtr_pdu_print(). CVSS 3.1CRITICAL 9.8
- TI-2017-09684 The ICMPv6 parser in tcpdump before 4.9.2 has a buffer over-read in print-icmp6.c:icmp6_nodeinfo_print(). CVSS 3.1CRITICAL 9.8
- TI-2017-09683 The MPTCP parser in tcpdump before 4.9.2 has a buffer over-read in print-mptcp.c, several functions. CVSS 3.1CRITICAL 9.8
Sources
- CVE-2018-19519 · CVE Program
- CVE-2018-19519 · NVD
- FIRST EPSS
- GHSA-7252-xx9j-xr4g · GitHub Advisory Database · CC BY 4.0
- CVE-2018-19519 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences