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CVE-2020-10571

Vulnerability in psd-tools (CVE-2020-10571)

Summary

Vulnerability in psd-tools (CVE-2020-10571). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 1.9.4 or later.

Original description

The description as published by the source.

Impact

An issue was discovered in psd-tools before 1.9.4. The Cython implementation of RLE decoding did not check for malformed PSD input data during decoding to the PIL.Image or NumPy format, leading to a Buffer Overflow.

Patches

Users of psd-tools version v1.8.37 to v1.9.3 should upgrade to v1.9.4.

Workarounds

Without Cython present on installation, buffer overflow does not occur but IndexError will be thrown. However, already installed psd-tools with Cython extention should be upgraded.

References

https://github.com/psd-tools/psd-tools/pull/198

For more information

If you have any questions or comments about this advisory:

Source: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2020-10571 has been found in psd-tools.
Risk of unauthorized operations or information disclosure.
What to do: upgrade psd-tools to 1.9.4 or later.
If unsure, ask your IT team or search "psd-tools CVE-2020-10571" on the vendor's site.

CVE-2020-10571 (psd-tools) — CWE-754
Patched: 1.9.4 — apply immediately
Workaround: Without Cython present on installation, buffer overflow does not occur but IndexError will be thrown.
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (CWE-754) exists in psd-tools.

📍 Affected scope

Check the vendor advisory for the affected versions of psd-tools.

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 1.9.4.

🛡️ Workaround

Workaround: Without Cython present on installation, buffer overflow does not occur but IndexError will be thrown.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'psd-tools' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    grep -r 'psd-tools' . | grep -v node_modules

    リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で psd-tools を grep し、稼働しているサービス・バージョンを把握する。

  2. 2
    Apply temporary workaround mitigate 
    Without Cython present on installation, buffer overflow does not occur but IndexError will be thrown.

    パッチが適用されるまでの応急処置として、Without Cython present on installation, buffer overflow does not occur but IndexError will be thrown. を実施。回避策の副作用 (機能低下) を確認した上で。

  3. 3
    Apply patch patch 
    Upgrade psd-tools to 1.9.4

    ステージング環境で 1.9.4 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。

  4. 4
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

pip psd-tools
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.4"}]}]

References

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