PT-2023-27754 · Python+3 · Restrictedpython+3

Abhishek Govindarasu + 2 · Published 2023-08-30 · Updated 2025-03-18 · CVE-2023-41039

Positive Technologies (AI Summary)

CVSS v3.1

8.3

High

Base vector

AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L

Name of the Vulnerable Software and Affected Versions RestrictedPython versions prior to 5.4 RestrictedPython versions prior to 6.2

Description Python's "format" functionality allows someone controlling the format string to "read" all objects accessible through recursive attribute lookup and subscription from objects he can access. This can lead to critical information disclosure. With RestrictedPython, the format functionality is available via the format and format map methods of str (and unicode) (accessed either via the class or its instances) and via string.Formatter.

Recommendations Upgrade to version 5.4 or later. Upgrade to version 6.2 or later. As a temporary workaround, consider restricting access to the format and format map methods of str (and unicode) until a patch is available. Avoid using the string.Formatter until the issue is resolved. At the moment, there is no other information about additional workarounds for this vulnerability.

Exploit

Fix

Special Elements Injection

Weakness Enumeration

CWE-74

Related Identifiers

CVE-2023-41039

GHSA-XJW2-6JM9-RF67

PYSEC-2023-159

USN-7355-1

Affected Products

Debian

Linuxmint

Restrictedpython

Ubuntu

References · 19

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/41xxx/CVE-2023-41039.json · Exploit
• https://github.com/zopefoundation/RestrictedPython/security/advisories/GHSA-xjw2-6jm9-rf67 · Vendor Advisory
• https://github.com/zopefoundation/RestrictedPython/commit/4134aedcff17c977da7717693ed89ce56d54c120 · Patch
• https://osv.dev/vulnerability/CVE-2023-41039 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-41039 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-41039 · Security Note
• https://ubuntu.com/security/CVE-2024-47532 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-41039 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-41039 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-7355-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-41039 · Security Note
• https://osv.dev/vulnerability/GHSA-xjw2-6jm9-rf67 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2023-159 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-41039 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22153 · Vendor Advisory