CVE intelligence and bounded remediation

CVE-2019-1741 — Cisco Ios Xe security vulnerability

High CVSS 8.6

A vulnerability in the Cisco Encrypted Traffic Analytics (ETA) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to a logic error that exists when handling a malformed incoming packet, leading to access to an internal data structure after it has been freed. An attacker could exploit this vulnerability by sending crafted, malformed IP packets to an affected device. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition.

Severity
High
CVSS
8.6 (3.0)
Published
2019-03-28
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-20, CWE-416

Affected products

  • cisco / ios_xe / 3.2.0ja
  • cisco / ios_xe / 16.6.1
  • cisco / ios_xe / 16.6.2
  • cisco / ios_xe / 16.6.3
  • cisco / ios_xe / 16.7.1
  • cisco / ios_xe / 16.7.1a

Showing 6 representative product identities from 14 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Use-after-free, double free, and expired resource use

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Trace ownership, references, callbacks, asynchronous tasks, and teardown paths around the affected object or resource.
  • Identify reachable inputs and timing or state transitions that can release the object while references remain.
  • Confirm affected builds, allocators, feature flags, architectures, and process privileges.

Remediate safely

  • Apply the maintained ownership or lifetime fix and rebuild all artifacts containing the affected native code.
  • Use explicit ownership, safe reference management, cancellation and join semantics, and idempotent teardown.
  • Add deterministic lifetime tests plus isolated sanitizer and concurrency coverage for shutdown and error paths.

Authoritative sources

Complete CVE record and remediation plan

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