Information disclosure in Zcash



Published: 2019-09-30
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-16930
CWE-ID CWE-200
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Zcash
Client/Desktop applications / Other client software

Vendor Electric Coin Co.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU21431

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-16930

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to an incorrect error handling implementation when performing deserialization of note plaintexts in Zcashd . A remote attacker gain knowledge of the IP address of a full node that owns a shielded address.

Successful vulnerability exploitation requires knowledge of zaddr.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zcash: 2.0.0 - 2.0.7-2

External links

http://duke.leto.net/2019/10/01/zcash-metadata-leakage-cve-2019-16930.html
http://github.com/zcash/zcash/commit/c1fbf8ab5d73cff5e1f45236995857c75ba4128d
http://github.com/zcash/zcash/releases/tag/v2.0.7-3
http://z.cash/support/security/announcements/security-announcement-2019-09-24/


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.



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