b2-sdk-python is a python library to access cloud storage provided by backblaze. Linux and Mac releases of the SDK version 1.14.0 and below contain a key disclosure vulnerability that, in certain conditions, can be exploited by local attackers through a time-of-check-time-of-use (TOCTOU) race condition. SDK users of the SqliteAccountInfo format are vulnerable while users of the InMemoryAccountInfo format are safe. The SqliteAccountInfo saves API keys (and bucket name-to-id mapping) in a local database file ($XDG_CONFIG_HOME/b2/account_info, ~/.b2_account_info or a user-defined path). When first created, the file is world readable and is (typically a few milliseconds) later altered to be private to the user. If the directory containing the file is readable by a local attacker then during the brief period between file creation and permission modification, a local attacker can race to open the file and maintain a handle to it. This allows the local attacker to read the contents after the file after the sensitive information has been saved to it. Consumers of this SDK who rely on it to save data using SqliteAccountInfo class should upgrade to the latest version of the SDK. Those who believe a local user might have opened a handle using this race condition, should remove the affected database files and regenerate all application keys. Users should upgrade to b2-sdk-python 1.14.1 or later.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - b2-sdk-python is a python library to access cloud storage provided by backblaze. Linux and Mac releases of
    the SDK version 1.14.0 and below contain a key disclosure vulnerability that, in certain conditions, can
    be exploited by local attackers through a time-of-check-time-of-use (TOCTOU) race condition. SDK users of
    the SqliteAccountInfo format are vulnerable while users of the InMemoryAccountInfo format are safe. The
    SqliteAccountInfo saves API keys (and bucket name-to-id mapping) in a local database file
    ($XDG_CONFIG_HOME/b2/account_info, ~/.b2_account_info or a user-defined path). When first created, the
    file is world readable and is (typically a few milliseconds) later altered to be private to the user. If
    the directory containing the file is readable by a local attacker then during the brief period between
    file creation and permission modification, a local attacker can race to open the file and maintain a
    handle to it. This allows the local attacker to read the contents after the file after the sensitive
    information has been saved to it. Consumers of this SDK who rely on it to save data using
    SqliteAccountInfo class should upgrade to the latest version of the SDK. Those who believe a local user
    might have opened a handle using this race condition, should remove the affected database files and
    regenerate all application keys. Users should upgrade to b2-sdk-python 1.14.1 or later. (CVE-2022-23651)

ID	Name	Product	Family	Type	Severity
417395	SCA: security update for b2sdk (GHSA-p867-fxfr-ph2w)	Tenable Cloud Security	SCA Checks	Local	medium
417395	SCA: security update for b2sdk (GHSA-p867-fxfr-ph2w)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2022-23651

medium

Tenable Plugins

medium

medium