Multiple vulnerabilities in Pure-Python ECDSA Python package



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
 python-ecdsa
Universal components / Libraries / Software for developers

Vendor Brian Warner

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU22619

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

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

Install updates from vendor's website.

Vulnerable software versions

python-ecdsa: 0.5 - 0.13.2

CPE2.3 External links

https://github.com/advisories/GHSA-pwfw-mgfj-7g3g
https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3


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

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-14859

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to signature malleability while processing DER-encoded data. A remote attacker can bypass certain security restrictions.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

python-ecdsa: 0.5 - 0.13.2

CPE2.3 External links

https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3


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.



###SIDEBAR###