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CVE-2020-15173— Heap buffer overflow in ACCEL-PPP

Quick assessment

Affected
accel-ppp accel-ppp
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.

ACCEL-PPP中存在缓冲区错误漏洞。该漏洞源于接收到一个带有AVP的L2TP控制包时，会出现缓冲区溢出。

CVSS 8.2 · High EPSS 1.18% · P68

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2020-15173

Vulnerability Information
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Vulnerability Title
Heap buffer overflow in ACCEL-PPP
Source: CVE Program / CVE List V5
Vulnerability Description
In ACCEL-PPP (an implementation of PPTP/PPPoE/L2TP/SSTP), there is a buffer overflow when receiving an l2tp control packet ith an AVP which type is a string and no hidden flags, length set to less than 6. If your application is used in open networks or there are untrusted nodes in the network it is highly recommended to apply the patch. The problem was patched with commit 2324bcd5ba12cf28f47357a8f03cd41b7c04c52b As a workaround changes of commit 2324bcd5ba12cf28f47357a8f03cd41b7c04c52b can be applied to older versions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
ACCEL-PPP 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ACCEL-PPP中存在缓冲区错误漏洞。该漏洞源于接收到一个带有AVP的L2TP控制包时，会出现缓冲区溢出。
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

Vendor Product Affected Versions CPE Subscribe
accel-ppp accel-ppp <= 1.12.0-92-g38b6104 -

II. Public POCs for CVE-2020-15173

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III. Intelligence Information for CVE-2020-15173

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Patches & Fixes for CVE-2020-15173 (1)

Vendor Advisories for CVE-2020-15173 (1)

IV. Related Vulnerabilities

Same product: accel-ppp
Same vendor: accel-ppp
Same weakness: CWE-119