How severe is CVE-2007-3153?

CVE-2007-3153 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2007-3153 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-3153?

CVE-2007-3153 primarily affects Daniel Stenberg C-ares. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-3153?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2007-3153 published?

CVE-2007-3153 was published on 2007-06-11 and last updated on 2026-06-16.

CVE-2007-3153

CVE-2007-3153 is a medium-severity vulnerability in Daniel Stenberg C-ares with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Daniel Stenberg C-ares
Published: 2007-06-11
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2007-3153?: CVE-2007-3153 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2007-3153 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-3153?: CVE-2007-3153 primarily affects Daniel Stenberg C-ares. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-3153?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-3153 published?: CVE-2007-3153 was published on 2007-06-11 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:daniel_stenberg:c-ares:1.0:*:*:*:*:*:*:*
cpe:2.3:a:daniel_stenberg:c-ares:1.1:*:*:*:*:*:*:*
cpe:2.3:a:daniel_stenberg:c-ares:1.2:*:*:*:*:*:*:*
cpe:2.3:a:daniel_stenberg:c-ares:1.2.1:*:*:*:*:*:*:*
cpe:2.3:a:daniel_stenberg:c-ares:1.3:*:*:*:*:*:*:*
cpe:2.3:a:daniel_stenberg:c-ares:1.3.1:*:*:*:*:*:*:*
cpe:2.3:a:daniel_stenberg:c-ares:1.3.2:*:*:*:*:*:*:*

More vulnerabilities in Daniel Stenberg C-ares

CVE-2007-3152 — High (CVSS 7.5): c-ares before 1.4.0 uses a predictable seed for the random number generator for the DNS Transaction ID field, which…

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