Amazon Linux AMI update for lftp

1) Security restrictions bypass

EUVDB-ID: #VU14187

Risk: Medium

CVSSv3.1: 4.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-10916

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The vulnerability exists due to improper sanitization of remote file names. A remote unauthenticated attacker can trick the victim into using reverse mirroring on an attacker controlled FTP server bypass security restrictions and remove all files in the current working directory of the victim's system.

Mitigation

Update the affected packages:

i686:
    lftp-4.4.8-12.30.amzn1.i686
    lftp-debuginfo-4.4.8-12.30.amzn1.i686

noarch:
    lftp-scripts-4.4.8-12.30.amzn1.noarch

src:
    lftp-4.4.8-12.30.amzn1.src

x86_64:
    lftp-4.4.8-12.30.amzn1.x86_64
    lftp-debuginfo-4.4.8-12.30.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2020-1383.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.