Amazon Linux AMI update for file

1) Buffer overflow

EUVDB-ID: #VU38300

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-1000249

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a local authenticated user to manipulate data.

An issue in file() was introduced in commit 9611f31313a93aa036389c5f3b15eea53510d4d1 (Oct 2016) lets an attacker overwrite a fixed 20 bytes stack buffer with a specially crafted .notes section in an ELF binary. This was fixed in commit 35c94dc6acc418f1ad7f6241a6680e5327495793 (Aug 2017).

Mitigation

Update the affected packages:

i686:
    file-debuginfo-5.30-11.34.amzn1.i686
    file-5.30-11.34.amzn1.i686
    file-devel-5.30-11.34.amzn1.i686
    file-libs-5.30-11.34.amzn1.i686
    file-static-5.30-11.34.amzn1.i686

noarch:
    python27-magic-5.30-11.34.amzn1.noarch
    python26-magic-5.30-11.34.amzn1.noarch

src:
    file-5.30-11.34.amzn1.src

x86_64:
    file-debuginfo-5.30-11.34.amzn1.x86_64
    file-5.30-11.34.amzn1.x86_64
    file-static-5.30-11.34.amzn1.x86_64
    file-devel-5.30-11.34.amzn1.x86_64
    file-libs-5.30-11.34.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*

External links

https://alas.aws.amazon.com/ALAS-2017-900.html

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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