CVE-2007-3153

The ares_init:randomize_key function in c-ares, on platforms other than Windows, uses a weak facility for producing a random number sequence (Unix rand), which makes it easier for remote attackers to spoof DNS responses by guessing certain values.

Published: 2007-06-11 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2007-3153 is rated Moderate Risk (43.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.19%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2007-3153

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.38% 1.19% +0.81%
2 2026-01-28 0.31% 0.38% +0.07%
3 2025-03-30 — 0.31% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2007-3153

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2007-3153

Affected software / configurations for CVE-2007-3153

Vendor Product Version Raw CPE
daniel_stenberg c-ares 1.0 cpe:2.3:a:daniel_stenberg:c-ares:1.0:*:*:*:*:*:*:*
daniel_stenberg c-ares 1.1 cpe:2.3:a:daniel_stenberg:c-ares:1.1:*:*:*:*:*:*:*
daniel_stenberg c-ares 1.2 cpe:2.3:a:daniel_stenberg:c-ares:1.2:*:*:*:*:*:*:*
daniel_stenberg c-ares 1.2.1 cpe:2.3:a:daniel_stenberg:c-ares:1.2.1:*:*:*:*:*:*:*
daniel_stenberg c-ares 1.3 cpe:2.3:a:daniel_stenberg:c-ares:1.3:*:*:*:*:*:*:*
daniel_stenberg c-ares 1.3.1 cpe:2.3:a:daniel_stenberg:c-ares:1.3.1:*:*:*:*:*:*:*
daniel_stenberg c-ares 1.3.2 cpe:2.3:a:daniel_stenberg:c-ares:1.3.2:*:*:*:*:*:*:*

References for CVE-2007-3153

cvelogic Threat Intelligence