SB2016123027 - Buffer overflow in samba (Alpine package)

Description

This security bulletin contains information about 1 security vulnerability.

1) Buffer overflow (CVE-ID: CVE-2016-2126)

The vulnerability allows a remote authenticated attacker to escalate privileges.

The vulnerability exists due to a boundary error within Kerberos PAC validation process in winbindd. A remote authenticated attacker can send a specially crafted request to vulnerable Samba server, trigger buffer overflow and execute arbitrary code on the server with elevated privileges.

Successful exploitation of the vulnerability may allow an attacker to execute arbitrary code with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://git.alpinelinux.org/aports/commit/?id=70271759e87dbeef4f90e6dcae9183d5ea5e3048
• https://git.alpinelinux.org/aports/commit/?id=3dfb07619755d258fed8bfd510b53e3d8a692361
• https://git.alpinelinux.org/aports/commit/?id=80cc0ea448006f152c00467301743534bcd0ee65