Detections
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Echo: curl-7.69.1: security update to 7.69.1+e2

medium Tenable Self-Hosted Container Security Plugin ID 478542

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - When curl >= 7.20.0 and <= 7.78.0 connects to an IMAP or POP3 server to retrieve data using STARTTLS to
 upgrade to TLS security, the server can respond and send back multiple responses at once that curl caches.
 curl would then upgrade to TLS but not flush the in-queue of cached responses but instead continue using
 and trustingthe responses it got *before* the TLS handshake as if they were authenticated.Using this flaw,
 it allows a Man-In-The-Middle attacker to first inject the fake responses, then pass-through the TLS
 traffic from the legitimate server and trick curl into sending data back to the user thinking the
 attacker's injected data comes from the TLS-protected server. (CVE-2021-22947)

Solution

Update the curl-7.69.1 library and its related packages to version 7.69.1+e2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2021-22947

Plugin Details

Severity: Medium

ID: 478542

Version: Revision 1.1

Type: Local

Published: 11/5/2026

Updated: 11/5/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.69

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.4

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2021-22947

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.3

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/5/2026

Vulnerability Publication Date: 9/17/2021

Reference Information

CVE: CVE-2021-22947