Buffer overflow in heimdal (Alpine package)



Published: 2012-01-10
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
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heimdal (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one critical risk vulnerability.

1) Buffer overflow

EUVDB-ID: #VU3031

Risk: Critical

CVSSv3.1:

CVE-ID: CVE-2011-4862

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

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

Install update from vendor's website.

Vulnerable software versions

heimdal (Alpine package): 1.3.3-r2


CPE2.3 External links

http://git.alpinelinux.org/aports/commit/?id=77e78b8f7202366649fb6f10196a767c3d0ce3b3
http://git.alpinelinux.org/aports/commit/?id=bb7500d2700767ec6df3fe37b9f75dc53bc91347
http://git.alpinelinux.org/aports/commit/?id=f81ee55cee797b4203340cebc3f15691ac93faeb

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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