FrSIRT - Apache-SSL "ExpandCert()" Environment Variable Overwrite Vulnerability / Exploit (Security Advisories)

French Security Incident Response Team

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Apache-SSL "ExpandCert()" Environment Variable Overwrite Vulnerability

Title : Apache-SSL "ExpandCert()" Environment Variable Overwrite Vulnerability
Advisory ID : FrSIRT/ADV-2008-1079
CVE ID : CVE-2008-0555
Rated as : Low Risk

Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2008-04-03

Advisory Details

Description

Affected Products

Solution

References

Technical Description

A vulnerability has been identified in Apache-SSL, which could be exploited by attackers to bypass security restrictions and disclose sensitive information. This issue is caused by an error in the "ExpandCert()" function when handling client certificates, which could be exploited by attackers to overwrite environment variables and disclose memory data by manipulating the relative distinguished name in a certificate.

Credits

Vulnerability reported by Alexander Klink (Cynops GmbH).

ChangeLog

2008-04-03 : Initial release

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