SB2017083110 - openSUSE update for exim

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Default set-uid root for perl_startup script (CVE-ID: CVE-2016-1531)

The vulnerability allows a local user to obtain elevated privileges.

The vulnerability exists due to improper default permission for "perl_startup" startup script, which has set-uid root bit. A local user can obtain root privileges on the system.

Successful exploitation of this vulnerability will allow the local attacker to obtain elevated privileges and execute arbitrary commands as root.

2) Information disclosure (CVE-ID: CVE-2016-9963)

The vulnerability allows a remote attacker to obtain potentially sensitive information.

The vulnerability exists due to usage of incorrect buffer when displaying error message for DATA command in src/src/transports/smtp.c file. A remote unauthenticated attacker can send a specially crafted SMTP command and obtain potentially sensitive information, such as DKIM key.

3) Memory corruption (CVE-ID: CVE-2017-1000369)

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The vulnerability exists due to memory management errors in implementation of various functions under multiple operating systems. A local or remote attacker can overflow group_list[] buffer in Exim main() function to manipulate the heap/stack, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Remediation

Install update from vendor's website.

References

• https://lists.opensuse.org/opensuse-security-announce/2017-08/msg00072.html