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.
4d1c0664786aa724ab53583f3fef9a7abd6f25ae6008251ecde90b82fec34351Exim 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.
c8b37f6ba0c1a3bd66f5d17781dd1c98a33edc213484ca6db8095fef81937ebcExim versions 4.84-3 and below suffer from a local privilege escalation vulnerability.
338e278d54bff0fcb3160902a0f4e6e04e509da47b831229d06ee56563a1ce5c
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