Amazon Linux AMI update for python-ecdsa

Published: 2023-08-09

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2019-14853 CVE-2019-14859
CWE-ID	CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Amazon Linux AMI Operating systems & Components / Operating system python-ecdsa Operating systems & Components / Operating system package or component
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU22619

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-14853

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when decoding digital signatures. A remote attacker can send specially crafted data to the application that uses Pure-Python ECDSA module and perform a denial of service attack.

Mitigation

Update the affected packages:

noarch:
    python27-ecdsa-0.11-3.4.amzn1.noarch
    python26-ecdsa-0.11-3.4.amzn1.noarch

src:
    python-ecdsa-0.11-3.4.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

python-ecdsa: before 0.11-3.4

External links

http://alas.aws.amazon.com/ALAS-2023-1800.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.

2) Input validation error

EUVDB-ID: #VU22620