The L2TP protocol parser in tcpdump 3.8.1 and earlier allows remote attackers to cause a…
Priority LOW 35Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
The L2TP protocol parser in tcpdump 3.8.1 and earlier allows remote attackers to cause a denial of service (infinite loop and memory consumption) via a packet with invalid data to UDP port 1701, which causes l2tp_avp_print to use a bad length value when calling print_octets.
Why it matters now
EPSS 0.0992 95th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
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 · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:lbl:tcpdump:3.4:*:*:*:*:*:*:* | 3.4 | Vulnerable | Lbl |
| cpe:2.3:a:lbl:tcpdump:3.5:*:*:*:*:*:*:* | 3.5 | Vulnerable | Lbl |
| cpe:2.3:a:lbl:tcpdump:3.5.2:*:*:*:*:*:*:* | 3.5.2 | Vulnerable | Lbl |
| cpe:2.3:a:lbl:tcpdump:3.6.2:*:*:*:*:*:*:* | 3.6.2 | Vulnerable | Lbl |
| cpe:2.3:a:lbl:tcpdump:3.6.3:*:*:*:*:*:*:* | 3.6.3 | Vulnerable | Lbl |
| cpe:2.3:a:lbl:tcpdump:3.7:*:*:*:*:*:*:* | 3.7 | Vulnerable | Lbl |
- cpe:2.3:a:lbl:tcpdump:3.4:*:*:*:*:*:*:* Versions 3.4 Vulnerable ·Lbl
- cpe:2.3:a:lbl:tcpdump:3.5:*:*:*:*:*:*:* Versions 3.5 Vulnerable ·Lbl
- cpe:2.3:a:lbl:tcpdump:3.5.2:*:*:*:*:*:*:* Versions 3.5.2 Vulnerable ·Lbl
- cpe:2.3:a:lbl:tcpdump:3.6.2:*:*:*:*:*:*:* Versions 3.6.2 Vulnerable ·Lbl
- cpe:2.3:a:lbl:tcpdump:3.6.3:*:*:*:*:*:*:* Versions 3.6.3 Vulnerable ·Lbl
- cpe:2.3:a:lbl:tcpdump:3.7:*:*:*:*:*:*:* Versions 3.7 Vulnerable ·Lbl
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2003-1029
- 2026-10-03 Alias added: GHSA-3h9x-q7vx-j2wh
References
More Lbl Tcpdump vulnerabilities
- TI-2000-01016 Multiple buffer overflows in LBNL tcpdump allow remote attackers to execute arbitrary commands. CVSS 2.0HIGH 10.0
- TI-2005-01205 tcpdump 3.8.3 and earlier allows remote attackers to cause a denial of service (infinite… CVSS 2.0MEDIUM 5.0
- TI-2002-00367 Buffer overflow in tcpdump 3.6.2 and earlier allows remote attackers to cause a denial of… CVSS 2.0HIGH 7.5
- TI-2001-01232 Buffer overflow in print-rx.c of tcpdump 3.x (probably 3.6x) allows remote attackers to… CVSS 2.0HIGH 7.5
- TI-2005-01197 The bgp_update_print function in tcpdump 3.x does not properly handle a -1 return value… CVSS 2.0MEDIUM 5.0
- TI-1999-00974 ip_print procedure in Tcpdump 3.4a allows remote attackers to cause a denial of service… CVSS 2.0HIGH 7.5
Sources
- CVE-2003-1029 · CVE Program
- CVE-2003-1029 · NVD
- FIRST EPSS
- GHSA-3h9x-q7vx-j2wh · GitHub Advisory Database · CC BY 4.0
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