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TITLE:
Red Hat Certificate Server MD5 and SCEP Vulnerabilities

SECUNIA ADVISORY ID:
SA42181

VERIFY ADVISORY:
Secunia.com
https://secunia.com/advisories/42181/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=42181

RELEASE DATE:
2010-11-10

DISCUSS ADVISORY:
https://secunia.com/advisories/42181/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

https://secunia.com/advisories/42181/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=42181

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

https://secunia.com/vulnerability_scanning/personal/
https://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Red Hat has acknowledged a security issue and some vulnerabilities in
Red Hat Certificate System, which can be exploited by malicious people
to conduct spoofing attacks and malicious users and malicious people
to bypass certain security features.

1) The certificate authority does not properly restrict certain SCEP
calls to authenticated registration authorities, which can be
exploited to e.g. decrypt a sniffed one-time PIN.

2) The certificate authority does not properly prevent one-time PINs
from being used multiple times in enrollment requests, which can be
exploited to e.g. generate an unlimited amount of certificates.

Successful exploitation requires a valid enrollment one-time PIN.

3) The certificate authority uses the MD5 cryptographic hash function
to sign SCEP responses, which can be exploited to facilitate spoofing
via collision attacks.

SOLUTION:
Updated packages are available via Red Hat Network.

Further details available in Customer Area:
https://secunia.com/products/corporate/EVM/

PROVIDED AND/OR DISCOVERED BY:
1, 2) Reported by a Red Hat customer.
3) Reported by the vendor.

ORIGINAL ADVISORY:
RHSA-2010-0837:
https://rhn.redhat.com/errata/RHSA-2010-0837.html

RHSA-2010-0838:
https://rhn.redhat.com/errata/RHSA-2010-0838.html

OTHER REFERENCES:
Further details available in Customer Area:
https://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
https://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
https://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
https://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
https://secunia.com/products/corporate/EVM/

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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

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