CVE-2020-15702— TOCTOU in apport
Quick assessment
Affected
Canonical apport
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Apport是一款用于收集并反馈错误信息（当应用程序崩溃时操作系统认为有用的信息）的工具包。 Apport中存在竞争条件问题漏洞。本地攻击者可利用该漏洞提升权限并执行任意代码。
Possible ATT&CK Techniques 3 AI
T1055 · Process Injection T1068 · Exploitation for Privilege Escalation T1656
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I. Basic Information for CVE-2020-15702
Vulnerability Information
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Vulnerability Title
TOCTOU in apport
Source: CVE Program / CVE List V5
Vulnerability Description
TOCTOU Race Condition vulnerability in apport allows a local attacker to escalate privileges and execute arbitrary code. An attacker may exit the crashed process and exploit PID recycling to spawn a root process with the same PID as the crashed process, which can then be used to escalate privileges. Fixed in 2.20.1-0ubuntu2.24, 2.20.9 versions prior to 2.20.9-0ubuntu7.16 and 2.20.11 versions prior to 2.20.11-0ubuntu27.6. Was ZDI-CAN-11234.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5
Vulnerability Title
Apport 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apport是一款用于收集并反馈错误信息（当应用程序崩溃时操作系统认为有用的信息）的工具包。 Apport中存在竞争条件问题漏洞。本地攻击者可利用该漏洞提升权限并执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2020-15702
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2020-15702 (3)
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https://www.zerodayinitiative.com/advisories/ZDI-20-979/ x_refsource_MISC
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https://usn.ubuntu.com/4449-1 x_refsource_CONFIRM
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Same Patch Batch · Canonical · 2020-08-06 · 3 CVEs total
| CVE-2020-11937 | 5.5 MEDIUM | Resource exhaustion vulnerability in whoopsie |
| CVE-2020-15701 | 5.5 MEDIUM | Unhandled exception in apport |
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Same weakness: CWE-367
V. Comments for CVE-2020-15702
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