FreeBSD : py-flask-caching -- remote code execution or local privilege escalation vulnerabilities (692a5fd5-bb25-4df4-8a0e-eb91581f2531)

critical Nessus Plugin ID 180375

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

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 692a5fd5-bb25-4df4-8a0e-eb91581f2531 advisory.

- ** DISPUTED ** The Flask-Caching extension through 1.10.1 for Flask relies on Pickle for serialization, which may lead to remote code execution or local privilege escalation. If an attacker gains access to cache storage (e.g., filesystem, Memcached, Redis, etc.), they can construct a crafted payload, poison the cache, and execute Python code. NOTE: a third party indicates that exploitation is extremely unlikely unless the machine is already compromised; in other cases, the attacker would be unable to write their payload to the cache and generate the required collision. (CVE-2021-33026)

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

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 180375

File Name: freebsd_pkg_692a5fd5bb254df48a0eeb91581f2531.nasl

Version: 1.0

Type: local

Family: FreeBSD Local Security Checks

Published: 8/31/2023

Updated: 8/31/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2021-33026

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:py311-flask-caching, p-cpe:/a:freebsd:freebsd:py38-flask-caching, p-cpe:/a:freebsd:freebsd:py310-flask-caching, cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:py39-flask-caching, p-cpe:/a:freebsd:freebsd:py37-flask-caching

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 8/31/2023

Vulnerability Publication Date: 5/13/2021

Reference Information

CVE: CVE-2021-33026

Detections

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