The ISAKMP parser in tcpdump before 4.9.2 could enter an infinite loop due to bugs in print-isakmp.c, several functions.
- Published
- Sep 14, 2017
- Updated
- Jun 16, 2026
- EPSS
- 2.5% · 84th percentile
- CWE
- CWE-835
Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.
Report tools
Action score
40
Plan
Add it to your regular patch cycle.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.5%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| tcpdump | tcpdump | cpe:2.3:a:tcpdump:tcpdump |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- tcpdump tcpdumpup to 4.9.1 inclusive
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | tcpdump | before 4.9.2-1 | 4.9.2-1 |
| Debian:7 | tcpdump | before 4.9.2-1~deb7u1 | 4.9.2-1~deb7u1 |
| Debian:8 | tcpdump | before 4.9.2-1~deb8u1 | 4.9.2-1~deb8u1 |
| Debian:9 | tcpdump | before 4.9.2-1~deb9u1 | 4.9.2-1~deb9u1 |
| SUSE:Linux Enterprise Desktop 12 SP2 | tcpdump | before 4.9.2-14.5.1 | 4.9.2-14.5.1 |
Same product
tcpdump: all recordsOther highest-scoring records for the same primary product.
- CVE-2007-3798Integer overflow in print-bgp.c in the BGP dissector in tcpdump 3.9.6 and earlier allows remote attackers to execute arbitrary code via craf60This week
- CVE-2017-11543tcpdump 4.9.0 has a buffer overflow in the sliplink_print function in print-sl.c.41Plan
- CVE-2017-5484The ATM parser in tcpdump before 4.9.0 has a buffer overflow in print-atm.c:sig_print().41Plan
- CVE-2017-5482The Q.933 parser in tcpdump before 4.9.0 has a buffer overflow in print-fr.c:q933_print(), a different vulnerability than CVE-2016-8575.41Plan
- CVE-2017-5342In tcpdump before 4.9.0, a bug in multiple protocol parsers (Geneve, GRE, NSH, OTV, VXLAN and VXLAN GPE) could cause a buffer overflow in pr41Plan
- CVE-2017-5341The OTV parser in tcpdump before 4.9.0 has a buffer overflow in print-otv.c:otv_print().41Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Debian:tcpdump | 4.9.2-1 · Debian:12 | Package registry (OSV) |
| SUSE:tcpdump | 4.9.2-14.5.1 · SUSE:Linux Enterprise Desktop 12 SP2 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- www.debian.org/security/2017/dsa-3971
- www.securitytracker.com/id/1039307
- www.tcpdump.org/tcpdump-changes.txt
- access.redhat.com/errata/RHEA-2018:0705
- github.com/the-tcpdump-group/tcpdump/commit/c2ef693866beae071a24b45c49f9674af1df4028
- security.gentoo.org/glsa/201709-23
- support.apple.com/HT208221
Vendor advisories and official records. Exploit/PoC links are deliberately left out.