CVE-2025-32797

June 16, 2025, 7:15 p.m.

6.0
Medium

Description

Conda-build contains commands and tools to build conda packages. Prior to version 25.3.1, The write_build_scripts function in conda-build creates the temporary build script conda_build.sh with overly permissive file permissions (0o766), allowing write access to all users. Attackers with filesystem access can exploit a race condition to overwrite the script before execution, enabling arbitrary code execution under the victim's privileges. This risk is significant in shared environments, potentially leading to full system compromise. Even with non-static directory names, attackers can monitor parent directories for file creation events. The brief window between script creation (with insecure permissions) and execution allows rapid overwrites. Directory names can also be inferred via timestamps or logs, and automation enables exploitation even with semi-randomized paths by acting within milliseconds of detection. This issue has been patched in version 25.3.1. A workaround involves restricting conda_build.sh permissions from 0o766 to 0o700 (owner-only read/write/execute). Additionally, use atomic file creation (write to a temporary randomized filename and rename atomically) to minimize the race condition window.

Product(s) Impacted

Vendor Product Versions
Conda
  • Conda-build
  • <25.3.1

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-277
Insecure Inherited Permissions
A product defines a set of insecure permissions that are inherited by objects that are created by the program.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a conda conda-build <25.3.1 / / / / / / /

References

https://github.com/conda/conda-build/blob/3f06913bba22c4e1ef1065df9e00d86ac97f087c/conda_build/build.py#L3054-L3084
https://github.com/conda/conda-build/commit/d246e49c8f45e8033915156ee3d77769926f3c2e
https://github.com/conda/conda-build/pull/5
https://github.com/conda/conda-build/security/advisories/GHSA-vfp6-3v8g-vcmm

Tags

security-advisories@github.com
CWE-277
2025-06-16
CVE-2025-32797

CVSS Score

6.0 / 10

CVSS Data - 4.0

  • Attack Vector: LOCAL
  • Attack Complexity: LOW
  • Attack Requirements: PRESENT
  • Privileges Required: NONE
  • User Interaction: NONE
  • Scope:
  • Confidentiality Impact: LOW
  • Integrity Impact: HIGH
  • Availability Impact: HIGH
  • Exploit Maturity: NOT_DEFINED

    • CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

    View Vector String

Timeline

Published: June 16, 2025, 7:15 p.m.
Last Modified: June 16, 2025, 7:15 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

security-advisories@github.com

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.