Integer underflow in Ettercap 0.8.1 allows remote attackers to cause a denial of service (out-of-bounds write) and possibly execute arbitrar
Integer underflow in Ettercap 0.8.1 allows remote attackers to cause a denial of service (out-of-bounds write) and possibly execute arbitrary code via a small (1) size variable value in the dissector_dhcp function in dissectors/ec_dhcp.c, (2) length value to the dissector_gg function in dissectors/ec_gg.c, or (3) string length to the get_decode_len function in ec_utils.c or a request without a (4) username or (5) password to the dissector_TN3270 function in dissectors/ec_TN3270.c.
- Published
- Dec 19, 2014
- Updated
- Jun 16, 2026
- EPSS
- 4.1% · 90th percentile
- CWE
- —
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Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 4.1%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| ettercap-project | ettercap | cpe:2.3:a:ettercap-project:ettercap |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- ettercap-project ettercap0.8.1
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | ettercap | before 1:0.8.1-3 | 1:0.8.1-3 |
Same product
ettercap-project: all recordsOther highest-scoring records for the same primary product.
- CVE-2010-3844An unchecked sscanf() call in ettercap before 0.7.5 allows an insecure temporary settings file to overflow a static-sized buffer on the stac35Monitor
- CVE-2014-6395Heap-based buffer overflow in the dissector_postgresql function in dissectors/ec_postgresql.c in Ettercap before 0.8.1 allows remote attacke34Monitor
- CVE-2010-3843The GTK version of ettercap uses a global settings file at /tmp/.ettercap_gtk and does not verify ownership of this file.31Monitor
- CVE-2014-9379The radius_get_attribute function in dissectors/ec_radius.c in Ettercap 0.8.1 performs an incorrect cast, which allows remote attackers to c31Monitor
- CVE-2014-9378Ettercap 0.8.1 does not validate certain return values, which allows remote attackers to cause a denial of service (crash) or possibly execu31Monitor
- CVE-2014-9377Heap-based buffer overflow in the nbns_spoof function in plug-ins/nbns_spoof/nbns_spoof.c in Ettercap 0.8.1 allows remote attackers to cause31Monitor
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:ettercap | 1:0.8.1-3 · Debian:12 | 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
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- P · data can be read
- Integrity
- P · data or configuration can be modified
- Availability
- P · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- P
- Integrity impact
- P
- Availability impact
- P
Weakness class (CWE)
—
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
nvd-primary
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✗ → ✓
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References
- www.securityfocus.com/archive/1/534248/100/0/threaded
- www.securityfocus.com/bid/71696
- github.com/Ettercap/ettercap/pull/602
- github.com/Ettercap/ettercap/pull/605
- github.com/Ettercap/ettercap/pull/606
- github.com/Ettercap/ettercap/pull/609
- security.gentoo.org/glsa/201505-01
- www.obrela.com/home/security-labs/advisories/osi-advisory-osi-1402/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.