Use-After-Free in Adobe acrobat (CVE-2020-9715, KEV)

Summary

vulnerability in Adobe acrobat (CVE-2020-9715). Risk of unauthorized operations or information disclosure. Listed in CISA KEV — actively exploited.

Original description

The description as published by the source.

Adobe Acrobat contains a use-after-free vulnerability that allows for code execution

Source: CISA Known Exploited Vulnerabilities NVD CISA KEV

AI summary

Written by an external AI model and may contain mistakes. Check the original description and references below before acting on it.

A severe vulnerability has been found in Adobe Acrobat, allowing attackers to execute malicious code using PDF files. Similar past incidents highlight the need for prompt action. It is recommended to apply the latest security updates provided by Adobe to minimize business impact.

Adobe Acrobat contains a use-after-free vulnerability occurring during PDF file interactions, which allows attackers to execute arbitrary code. While specific affected and fixed versions were not noted, applying the latest security patch from Adobe is recommended. A temporary workaround was not specified, but avoiding handling potentially malicious files would be prudent.

❓ What is the problem

A use-after-free vulnerability in Adobe Acrobat that allows code execution.

📍 Affected scope

Occurs during interaction with specific PDF files in Adobe Acrobat.

🔥 Severity

High severity, capable of remote code execution with exploitation of user interaction.

🔧 How to fix

Install the latest security patch provided by Adobe.

🛡️ Workaround

Material does not specify workarounds; avoid opening untrusted PDF files as a precaution.

🔍 Detection

Material does not specify any detection methods; monitor for suspicious Acrobat processes and network activity.

Related past incidents Similar incidents extracted from past CVEs

CVE-2018-4990

Adobe Acrobat had a similar use-after-free vulnerability allowing code execution.

Heartbleed

A notorious bug in OpenSSL that allowed attackers to read memory of applications via crafted packets, disclosing sensitive information.

CVE-2021-21017

Another Adobe Acrobat vulnerability, involving arbitrary code execution via crafted PDF files.

If this happens at your company Expected impact per business scenario

📌 In an enterprise setting using PDF files for sensitive documents

Unauthorized access or data leakage caused by executing malicious code.

📌 In educational institutions sharing PDF resources with students

Potential for widespread compromise of student devices and data.

📌 In a governmental agency where classified information is encrypted in PDFs

Risk of sensitive or classified data exposure if exploited.

Recommended action

Regularly update all software with the latest security patches to mitigate vulnerabilities.

Response actions

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

1
Identify exposure identify
```
grep -r 'acrobat' . | 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 acrobat を grep し、稼働しているサービス・バージョンを把握する。
4
Consider incident declaration escalate
```
Notify SOC / on-call
```
CISA KEV登録済 = 実環境で悪用が観測されている。Step 3 で兆候があればインシデント対応宣言、無くてもパッチ適用までWAF強化を最優先で。
7
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 Step 3 と同じログクエリでアラート再発が無いか継続監視。

References

advisory NVD