How severe is CVE-2008-0555?

CVE-2008-0555 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2008-0555 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-0555?

CVE-2008-0555 affects Apache-ssl. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2008-0555?

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

When was CVE-2008-0555 published?

CVE-2008-0555 was published on 2008-04-04 and last updated on 2026-06-16.

CVE-2008-0555

CVE-2008-0555 is a high-severity vulnerability in Apache-ssl with a CVSS 2.0 base score of 7.5. 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-20.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Apache-ssl
Published: 2008-04-04
Last modified: 2026-06-16

Description

The ExpandCert function in Apache-SSL before apache_1.3.41+ssl_1.59 does not properly handle (1) '/' and (2) '=' characters in a Distinguished Name (DN) in a client certificate, which might allow remote attackers to bypass authentication via a crafted DN that triggers overwriting of environment variables.

Frequently asked questions

What is CVE-2008-0555?: The ExpandCert function in Apache-SSL before apache_1.3.41+ssl_1.59 does not properly handle (1) '/' and (2) '=' characters in a Distinguished Name (DN) in a client certificate, which might allow remote attackers to bypass authentication via a crafted DN that triggers overwriting of environment variables.
How severe is CVE-2008-0555?: CVE-2008-0555 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2008-0555 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-0555?: CVE-2008-0555 affects Apache-ssl. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2008-0555?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2008-0555 published?: CVE-2008-0555 was published on 2008-04-04 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:apache-ssl:apache-ssl:1.3.34_1.57:*:*:*:*:*:*:*

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