SB2019090530 - Information disclosure in Bitcoin Core

Description

This security bulletin contains information about 1 vulnerability.

1) Cleartext storage of sensitive information (CVE-ID: CVE-2019-15947)

CWE-ID: CWE-312 - Cleartext Storage of Sensitive Information

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

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to bitcoin-qt stores wallet.dat data unencrypted in memory. Upon a crash, it may dump a core file. If a user were to mishandle a core file, an attacker can reconstruct the user's wallet.dat file, including their private keys, via a grep "6231 0500" command.

Remediation

Install update from vendor's website.

References

• https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures#CVE-2019-15947
• https://gist.github.com/oxagast/50a121b2df32186e0c48411859d5861b
• https://github.com/bitcoin/bitcoin/issues/16824
• https://security.gentoo.org/glsa/202009-18