Debian update for krb5, krb5-appl



Risk Critical
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2011-4862
CWE-ID CWE-119
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
 Debian Linux
Operating systems & Components / Operating system

Vendor Debian

Security Bulletin

This security bulletin contains one critical risk vulnerability.

1) Buffer overflow

EUVDB-ID: #VU3031

Risk: Critical

CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red]

CVE-ID: CVE-2011-4862

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to buffer overflow in the encrypt_keyid() function of telnetd. A remote attacker can send a very large encryption key to telnetd daemon, trigger buffer overflow and execute arbitrary code with root privileges.

Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Note: the vulnerability was being actively exploited.

Mitigation

Update the affected package to version: 1.6.dfsg.4~beta1-5lenny7, 1:1.0.1-1.2

Vulnerable software versions

Debian Linux: All versions

CPE2.3 External links

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


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.



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