Amazon Linux AMI update for exim

1) Input validation error

EUVDB-ID: #VU41356

Risk: Medium

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2014-2972

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

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.

Mitigation

Update the affected packages:

i686:
    exim-mon-4.72-6.6.amzn1.i686
    exim-debuginfo-4.72-6.6.amzn1.i686
    exim-mysql-4.72-6.6.amzn1.i686
    exim-greylist-4.72-6.6.amzn1.i686
    exim-pgsql-4.72-6.6.amzn1.i686
    exim-4.72-6.6.amzn1.i686

src:
    exim-4.72-6.6.amzn1.src

x86_64:
    exim-pgsql-4.72-6.6.amzn1.x86_64
    exim-mon-4.72-6.6.amzn1.x86_64
    exim-greylist-4.72-6.6.amzn1.x86_64
    exim-4.72-6.6.amzn1.x86_64
    exim-debuginfo-4.72-6.6.amzn1.x86_64
    exim-mysql-4.72-6.6.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2014-395.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.