python-tuf is a Python reference implementation of The Update Framework (TUF). In both clients (`tuf/client` and `tuf/ngclient`), there is a path traversal vulnerability that in the worst case can overwrite files ending in `.json` anywhere on the client system on a call to `get_one_valid_targetinfo()`. It occurs because the rolename is used to form the filename, and may contain path traversal characters (ie `../../name.json`). The impact is mitigated by a few facts: It only affects implementations that allow arbitrary rolename selection for delegated targets metadata, The attack requires the ability to A) insert new metadata for the path-traversing role and B) get the role delegated by an existing targets metadata, The written file content is heavily restricted since it needs to be a valid, signed targets file. The file extension is always .json. A fix is available in version 0.19 or newer. There are no workarounds that do not require code changes. Clients can restrict the allowed character set for rolenames, or they can store metadata in files named in a way that is not vulnerable: neither of these approaches is possible without modifying python-tuf.

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

  - python-tuf is a Python reference implementation of The Update Framework (TUF). In both clients
    (`tuf/client` and `tuf/ngclient`), there is a path traversal vulnerability that in the worst case can
    overwrite files ending in `.json` anywhere on the client system on a call to `get_one_valid_targetinfo()`.
    It occurs because the rolename is used to form the filename, and may contain path traversal characters (ie
    `../../name.json`). The impact is mitigated by a few facts: It only affects implementations that allow
    arbitrary rolename selection for delegated targets metadata, The attack requires the ability to A) insert
    new metadata for the path-traversing role and B) get the role delegated by an existing targets metadata,
    The written file content is heavily restricted since it needs to be a valid, signed targets file. The file
    extension is always .json. A fix is available in version 0.19 or newer. There are no workarounds that do
    not require code changes. Clients can restrict the allowed character set for rolenames, or they can store
    metadata in files named in a way that is not vulnerable: neither of these approaches is possible without
    modifying python-tuf. (CVE-2021-41131)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 85d976be-93e3-11ec-aaad-14dae9d5a9d2 advisory.

  - python-tuf is a Python reference implementation of The Update Framework (TUF). In both clients     (`tuf/client` and `tuf/ngclient`), there is a path traversal vulnerability that in the worst case can     overwrite files ending in `.json` anywhere on the client system on a call to `get_one_valid_targetinfo()`.
    It occurs because the rolename is used to form the filename, and may contain path traversal characters (ie     `../../name.json`). The impact is mitigated by a few facts: It only affects implementations that allow     arbitrary rolename selection for delegated targets metadata, The attack requires the ability to A) insert     new metadata for the path-traversing role and B) get the role delegated by an existing targets metadata,     The written file content is heavily restricted since it needs to be a valid, signed targets file. The file     extension is always .json. A fix is available in version 0.19 or newer. There are no workarounds that do     not require code changes. Clients can restrict the allowed character set for rolenames, or they can store     metadata in files named in a way that is not vulnerable: neither of these approaches is possible without     modifying python-tuf. (CVE-2021-41131)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
419980	SCA: security update for tuf (GHSA-wjw6-2cqr-j4qr)	Tenable Cloud Security	SCA Checks	medium
419980	SCA: security update for tuf (GHSA-wjw6-2cqr-j4qr)	Tenable Self-Hosted Container Security	SCA Checks	medium
158246	FreeBSD : The Update Framwork -- path traversal vulnerability (85d976be-93e3-11ec-aaad-14dae9d5a9d2)	Nessus	FreeBSD Local Security Checks	high

Detections

Analytics

CVE-2021-41131

medium

Tenable Plugins

medium

medium

high