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CVE-2016-1531

Status Candidate

Overview

Exim before 4.86.2, when installed setuid root, allows local users to gain privileges via the perl_startup argument.

Related Files

Ubuntu Security Notice USN-2933-1
Posted Mar 15, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2933-1 - It was discovered that Exim incorrectly filtered environment variables when used with the perl_startup configuration option. If the perl_startup option was enabled, a local attacker could use this issue to escalate their privileges to the root user. This issue has been fixed by having Exim clean the complete execution environment by default on startup, including any subprocesses such as transports that call other programs. This change in behaviour may break existing installations and can be adjusted by using two new configuration options, keep_environment and add_environment. Various other issues were also addressed.

tags | advisory, local, root
systems | linux, ubuntu
advisories | CVE-2014-2972, CVE-2016-1531
MD5 | a1078a57d283e95fe6df15895bb240b9
Exim Local Privilege Escalation
Posted Mar 10, 2016
Authored by Dawid Golunski

Exim versions prior to 4.86.2 suffer from a local root privilege escalation vulnerability. When Exim installation has been compiled with Perl support and contains a perl_startup configuration variable it can be exploited by malicious local attackers to gain root privileges.

tags | exploit, local, root, perl
advisories | CVE-2016-1531
MD5 | dfa8bd2eefce417043294f1a91f32077
Exim 4.84-3 Local Root / Privilege Escalation
Posted Mar 8, 2016
Authored by Hacker Fantastic

Exim versions 4.84-3 and below suffer from a local privilege escalation vulnerability.

tags | exploit, local
advisories | CVE-2016-1531
MD5 | c7eca99dab3294f44bfc299476cc4bef
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