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TITLE:
WatchGuard XCS "STARTTLS" Plaintext Injection Vulnerability

SECUNIA ADVISORY ID:
SA44753

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/44753/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=44753

RELEASE DATE:
2011-06-01

DISCUSS ADVISORY:
http://secunia.com/advisories/44753/#comments

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

http://secunia.com/advisories/44753/

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=44753

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

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

DESCRIPTION:
A vulnerability has been reported in WatchGuard XCS, which can be
exploited by malicious people to manipulate certain data.

The vulnerability is caused due to the TLS implementation not
properly clearing transport layer buffers when upgrading from
plaintext to ciphertext after receiving the "STARTTLS" command. This
can be exploited to insert arbitrary plaintext data (e.g. SMTP
commands) during the plaintext phase, which will then be executed
after upgrading to the TLS ciphertext phase.

The vulnerability is reported in versions 9.0 and 9.1.

SOLUTION:
Apply fixes.

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

PROVIDED AND/OR DISCOVERED BY:
Wietse Venema

ORIGINAL ADVISORY:
WatchGuard:
http://www.watchguard.com/support/release-notes/xcs/9/en-US/EN_ReleaseNotes_XCS_9_1_1/EN_ReleaseNotes_WG_XCS_9_1_TLS_Hotfix.pdf

US-CERT VU#555316:
http://www.kb.cert.org/vuls/id/555316
http://www.kb.cert.org/vuls/id/MAPG-8D9M75

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

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

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

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

EXPLOIT:
Further details available in Customer Area:
http://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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use those supplied by the vendor.

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