Detections
Analytics

Echo: c-ares-1.13.0: security update to 1.13.0+e1c-ares-1.16.0: security update to 1.16.0+e1c-ares-1.7.4: security update to 1.7.4+e1

medium Tenable Cloud Security Plugin ID 476252

Description

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

 - c-ares is an asynchronous resolver library. When /dev/urandom or RtlGenRandom() are unavailable, c-ares
 uses rand() to generate random numbers used for DNS query ids. This is not a CSPRNG, and it is also not
 seeded by srand() so will generate predictable output. Input from the random number generator is fed into
 a non-compilant RC4 implementation and may not be as strong as the original RC4 implementation. No attempt
 is made to look for modern OS-provided CSPRNGs like arc4random() that is widely available. This issue has
 been fixed in version 1.19.1. (CVE-2023-31147)

Solution

Update the c-ares-1.13.0 library and its related packages to version 1.13.0+e1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2023-31147

Plugin Details

Severity: Medium

ID: 476252

Version: Revision 1.1

Type: Local

Published: 10/20/2026

Updated: 10/20/2026

Risk Information

VPR

Risk Factor: Low

Score: 2.1

Percentile: 7.64

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2023-31147

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/20/2026

Vulnerability Publication Date: 5/24/2023

Reference Information

CVE: CVE-2023-31147