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TITLE:
FreeBSD update for telnetd

SECUNIA ADVISORY ID:
SA47397

VERIFY ADVISORY:
Secunia.com
https://secunia.com/advisories/47397/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=47397

RELEASE DATE:
2011-12-26

DISCUSS ADVISORY:
https://secunia.com/advisories/47397/#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/47397/

ONLY AVAILABLE IN CUSTOMER AREA:
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 * Report Reliability
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https://ca.secunia.com/?page=viewadvisory&vuln_id=47397

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:
FreeBSD has acknowledged a vulnerability in telnetd, which can be
exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the
"encrypt_keyid()" function
(crypto/heimdal/appl/telnet/libtelnet/encrypt.c and
contrib/telnet/libtelnet/encrypt.c), which can be exploited to cause
a buffer overflow by sending specially crafted commands to the
server.

NOTE: This vulnerability is currently being actively exploited.

SOLUTION:
Update FreeBSD or apply patch.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
FreeBSD-SA-11:08.telnetd:
https://security.freebsd.org/advisories/FreeBSD-SA-11:08.telnetd.asc

OTHER REFERENCES:
Further details available in Customer Area:
https://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
https://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
https://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
https://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
https://secunia.com/vulnerability_intelligence/

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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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Definitions: (Criticality, Where etc.)
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Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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