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CVE-2022-39320— Heap buffer overflow in urbdrc channel

Quick assessment

Affected
FreeRDP FreeRDP
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.

FreeRDP是FreeRDP团队的一款开源的远程桌面协议（RDP）的实现。 FreeRDP存在缓冲区错误漏洞，该漏洞源于FreeRDP可能会在太窄的类型上尝试整数加法，这会导致缓冲区的分配太小，无法容纳写入的数据。

CVSS 5.5 · Medium EPSS 0.68% · P50
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I. Basic Information for CVE-2022-39320

Vulnerability Information
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Vulnerability Title
Heap buffer overflow in urbdrc channel
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP is a free remote desktop protocol library and clients. Affected versions of FreeRDP may attempt integer addition on too narrow types leads to allocation of a buffer too small holding the data written. A malicious server can trick a FreeRDP based client to read out of bound data and send it back to the server. This issue has been addressed in version 2.9.0 and all users are advised to upgrade. Users unable to upgrade should not use the `/usb` redirection switch.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
FreeRDP 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeRDP是FreeRDP团队的一款开源的远程桌面协议（RDP）的实现。 FreeRDP存在缓冲区错误漏洞，该漏洞源于FreeRDP可能会在太窄的类型上尝试整数加法，这会导致缓冲区的分配太小，无法容纳写入的数据。
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
FreeRDP FreeRDP < 2.9.0 -

II. Public POCs for CVE-2022-39320

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III. Intelligence Information for CVE-2022-39320

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Vendor Advisories for CVE-2022-39320 (2)

Mailing List Discussions for CVE-2022-39320 (1)

Same Patch Batch · FreeRDP · 2022-11-16 · 7 CVEs total

CVE-2022-39316 4.8 MEDIUM Out of bound read in FreeRDP
CVE-2022-39318 4.8 MEDIUM Division by zero in urbdrc channel in FreeRDP
CVE-2022-39317 4.6 MEDIUM Out of bounds read in zgfx decoder in FreeRDP
CVE-2022-39319 4.6 MEDIUM Missing length validation in urbdrc channel in FreeRDP
CVE-2022-41877 4.6 MEDIUM Missing input length validation in `drive` channel in FreeRDP
CVE-2022-39347 2.6 LOW Missing path sanitation with `drive` channel in FreeRDP

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-125

V. Comments for CVE-2022-39320

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