7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.851 High
EPSS
Percentile
98.6%
Issue Overview:
Use-after-free in receive_msg function via vectors involving BDAT commands
The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands. (CVE-2017-16943)
Infinite loop and stack exhaustion in receive_msg function via vectors involving BDAT commands
The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to cause a denial of service (infinite loop and stack exhaustion) via vectors involving BDAT commands and an improper check for a ‘.’ character signifying the end of the content, related to the bdat_getc function. (CVE-2017-16944)
Affected Packages:
exim
Issue Correction:
Run yum update exim to update your system.
New Packages:
i686:
exim-mysql-4.89-4.17.amzn1.i686
exim-greylist-4.89-4.17.amzn1.i686
exim-debuginfo-4.89-4.17.amzn1.i686
exim-pgsql-4.89-4.17.amzn1.i686
exim-mon-4.89-4.17.amzn1.i686
exim-4.89-4.17.amzn1.i686
src:
exim-4.89-4.17.amzn1.src
x86_64:
exim-debuginfo-4.89-4.17.amzn1.x86_64
exim-4.89-4.17.amzn1.x86_64
exim-greylist-4.89-4.17.amzn1.x86_64
exim-mysql-4.89-4.17.amzn1.x86_64
exim-pgsql-4.89-4.17.amzn1.x86_64
exim-mon-4.89-4.17.amzn1.x86_64
Red Hat: CVE-2017-16943, CVE-2017-16944
Mitre: CVE-2017-16943, CVE-2017-16944
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 1 | i686 | exim-mysql | < 4.89-4.17.amzn1 | exim-mysql-4.89-4.17.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | exim-greylist | < 4.89-4.17.amzn1 | exim-greylist-4.89-4.17.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | exim-debuginfo | < 4.89-4.17.amzn1 | exim-debuginfo-4.89-4.17.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | exim-pgsql | < 4.89-4.17.amzn1 | exim-pgsql-4.89-4.17.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | exim-mon | < 4.89-4.17.amzn1 | exim-mon-4.89-4.17.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | exim | < 4.89-4.17.amzn1 | exim-4.89-4.17.amzn1.i686.rpm |
Amazon Linux | 1 | x86_64 | exim-debuginfo | < 4.89-4.17.amzn1 | exim-debuginfo-4.89-4.17.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | exim | < 4.89-4.17.amzn1 | exim-4.89-4.17.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | exim-greylist | < 4.89-4.17.amzn1 | exim-greylist-4.89-4.17.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | exim-mysql | < 4.89-4.17.amzn1 | exim-mysql-4.89-4.17.amzn1.x86_64.rpm |
7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.851 High
EPSS
Percentile
98.6%