How severe is CVE-2008-5398?

CVE-2008-5398 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2008-5398 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-5398?

CVE-2008-5398 primarily affects Tor. In total, 100 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-5398?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2008-5398 published?

CVE-2008-5398 was published on 2008-12-09 and last updated on 2026-06-16.

CVE-2008-5398

CVE-2008-5398 is a critical-severity vulnerability in Tor with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Tor
Published: 2008-12-09
Last modified: 2026-06-16

Description

Tor before 0.2.0.32 does not properly process the ClientDNSRejectInternalAddresses configuration option in situations where an exit relay issues a policy-based refusal of a stream, which allows remote exit relays to have an unknown impact by mapping an internal IP address to the destination hostname of a refused stream.

Frequently asked questions

What is CVE-2008-5398?: Tor before 0.2.0.32 does not properly process the ClientDNSRejectInternalAddresses configuration option in situations where an exit relay issues a policy-based refusal of a stream, which allows remote exit relays to have an unknown impact by mapping an internal IP address to the destination hostname of a refused stream.
How severe is CVE-2008-5398?: CVE-2008-5398 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2008-5398 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-5398?: CVE-2008-5398 primarily affects Tor. In total, 100 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-5398?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2008-5398 published?: CVE-2008-5398 was published on 2008-12-09 and last updated on 2026-06-16.

References

Affected products (100)

cpe:2.3:a:tor:tor:*:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre13:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre14:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre15:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre16:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre17:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre18:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre19:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre20:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre21:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre22:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre23:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre24:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre25:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre26:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.2_pre27:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.3:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.4:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.5:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.6:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.6.1:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.6.2:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.7:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.7.1:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.7.2:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.7.3:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.8:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.8.1:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.1:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.2:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.3:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.4:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.5:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.6:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.7:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.8:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.9:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.0.9.10:*:*:*:*:*:*:*

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