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amazonAmazonALAS-2018-970
HistoryMar 07, 2018 - 9:43 p.m.

Critical: exim

2018-03-0721:43:00
alas.aws.amazon.com
26

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

7.5 High

CVSS2

Access Vector

NETWORK

Access 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

0.968 High

EPSS

Percentile

99.7%

JSON

Issue Overview:

Buffer overflow in b64decode() function, possibly leading to remote code execution:
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. (CVE-2018-6789)

Affected Packages:

exim

Issue Correction:
Run yum update exim to update your system.

New Packages:

i686:  
    exim-mon-4.90.1-2.14.amzn1.i686  
    exim-greylist-4.90.1-2.14.amzn1.i686  
    exim-4.90.1-2.14.amzn1.i686  
    exim-mysql-4.90.1-2.14.amzn1.i686  
    exim-pgsql-4.90.1-2.14.amzn1.i686  
    exim-debuginfo-4.90.1-2.14.amzn1.i686  
  
src:  
    exim-4.90.1-2.14.amzn1.src  
  
x86_64:  
    exim-mysql-4.90.1-2.14.amzn1.x86_64  
    exim-debuginfo-4.90.1-2.14.amzn1.x86_64  
    exim-mon-4.90.1-2.14.amzn1.x86_64  
    exim-4.90.1-2.14.amzn1.x86_64  
    exim-greylist-4.90.1-2.14.amzn1.x86_64  
    exim-pgsql-4.90.1-2.14.amzn1.x86_64

Additional References

Red Hat: CVE-2018-6789

Mitre: CVE-2018-6789

OSVersionArchitecturePackageVersionFilename
Amazon Linux1i686exim-mon< 4.90.1-2.14.amzn1exim-mon-4.90.1-2.14.amzn1.i686.rpm
Amazon Linux1i686exim-greylist< 4.90.1-2.14.amzn1exim-greylist-4.90.1-2.14.amzn1.i686.rpm
Amazon Linux1i686exim< 4.90.1-2.14.amzn1exim-4.90.1-2.14.amzn1.i686.rpm
Amazon Linux1i686exim-mysql< 4.90.1-2.14.amzn1exim-mysql-4.90.1-2.14.amzn1.i686.rpm
Amazon Linux1i686exim-pgsql< 4.90.1-2.14.amzn1exim-pgsql-4.90.1-2.14.amzn1.i686.rpm
Amazon Linux1i686exim-debuginfo< 4.90.1-2.14.amzn1exim-debuginfo-4.90.1-2.14.amzn1.i686.rpm
Amazon Linux1x86_64exim-mysql< 4.90.1-2.14.amzn1exim-mysql-4.90.1-2.14.amzn1.x86_64.rpm
Amazon Linux1x86_64exim-debuginfo< 4.90.1-2.14.amzn1exim-debuginfo-4.90.1-2.14.amzn1.x86_64.rpm
Amazon Linux1x86_64exim-mon< 4.90.1-2.14.amzn1exim-mon-4.90.1-2.14.amzn1.x86_64.rpm
Amazon Linux1x86_64exim< 4.90.1-2.14.amzn1exim-4.90.1-2.14.amzn1.x86_64.rpm
Rows per page:
1-10 of 121

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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

7.5 High

CVSS2

Access Vector

NETWORK

Access 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

0.968 High

EPSS

Percentile

99.7%

JSON
Related for ALAS-2018-970
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