SB2019093004 - Information disclosure in Zcash

Description

This security bulletin contains information about 1 vulnerability.

1) Information disclosure (CVE-ID: CVE-2019-16930)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

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.

Remediation

Install update from vendor's website.

References

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