CVE-2018-6789
An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.
Known exploited
CVSS Score
9.8
EPSS Score
0.821
Published
2018-02-08
Exim supports the use of multiple "-p" command line arguments which are malloc()'ed and never free()'ed, used in conjunction with other issues allows attackers to cause arbitrary code execution. This affects exim version 4.89 and earlier. Please note that at this time upstream has released a patch (commit 65e061b76867a9ea7aeeb535341b790b90ae6c21), but it is not known if a new point release is available that addresses this issue at this time.
CVSS Score
4.0
EPSS Score
0.005
Published
2017-06-19
Exim before 4.87.1 might allow remote attackers to obtain the private DKIM signing key via vectors related to log files and bounce messages.
CVSS Score
5.9
EPSS Score
0.031
Published
2017-02-01
Exim before 4.86.2, when installed setuid root, allows local users to gain privileges via the perl_startup argument.
CVSS Score
7.0
EPSS Score
0.062
Published
2016-04-07
The dmarc_process function in dmarc.c in Exim before 4.82.1, when EXPERIMENTAL_DMARC is enabled, allows remote attackers to execute arbitrary code via the From header in an email, which is passed to the expand_string function.
CVSS Score
6.8
EPSS Score
0.053
Published
2014-09-04
expand.c in Exim before 4.83 expands mathematical comparisons twice, which allows local users to gain privileges and execute arbitrary commands via a crafted lookup value.
CVSS Score
4.6
EPSS Score
0.005
Published
2014-09-04
Heap-based buffer overflow in the dkim_exim_query_dns_txt function in dkim.c in Exim 4.70 through 4.80, when DKIM support is enabled and acl_smtp_connect and acl_smtp_rcpt are not set to "warn control = dkim_disable_verify," allows remote attackers to execute arbitrary code via an email from a malicious DNS server.
CVSS Score
6.8
EPSS Score
0.084
Published
2012-10-31
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