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Fencer Vulns
critical 9.8

CVE-2017-8366 json

The strescape function in ec_strings.c in Ettercap 0.8.2 allows remote attackers to cause a denial of service (heap-based buffer overflow a…

published 2017-04-30 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-17325

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

The strescape function in ec_strings.c in Ettercap 0.8.2 allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted filter that is mishandled by etterfilter.

Patch / fix

  • ettercap Debian 13, Debian 12 1:0.8.2-5

debian advisories DEBIAN-CVE-2017-8366

  • ettercap Ubuntu 14.04 LTS 1:0.8.0-11ubuntu0.3
  • ettercap Ubuntu 16.04 LTS 1:0.8.2-2ubuntu1.16.04.1

ubuntu advisories UBUNTU-CVE-2017-8366

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • ettercap Arch Linux 0.8.2-5

arch linux advisories AVG-212

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-8366 updated cvss 6.5

ettercap: Heap-based buffer overflow in strescape function in ec_strings.c

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.71% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • blogs.gentoo.org https://blogs.gentoo.org/ago/2017/04/29/ettercap-etterfilter-heap-based-buffer-overflow-write/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.