CVE-2008-0555

Exp

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.

Published: 2008-04-04 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2008-0555 is rated High Exploit Risk (69.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.60%). 3 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2008-0555

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2008-0555

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 2026-04-30 0.52% 0.60% +0.07%
2 2025-03-30 0.69% 0.52% -0.17%
3 2025-03-29 — 0.69% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2008-0555

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P 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:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2008-0555

OS Trackers for CVE-2008-0555

vendor priority summary link
ubuntu low CVE-2008-0555 low priority: Ubuntu including 1 source packages (apache), 9 status rows across 9 suites (dapper, edgy, feisty, gutsy, hardy, intrepid, jaunty, karmic, upstream): DNE 5, ignored 3, released 1. https://ubuntu.com/security/CVE-2008-0555

Affected software / configurations for CVE-2008-0555

Vendor Product Version Raw CPE
apache-ssl apache-ssl 1.3.34_1.57 cpe:2.3:a:apache-ssl:apache-ssl:1.3.34_1.57:*:*:*:*:*:*:*

References for CVE-2008-0555

cvelogic Threat Intelligence