CVE-2023-39356— Missing offset validation leading to Out-of-Bounds Read in FreeRDP
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I. Basic Information for CVE-2023-39356
Vulnerability Information
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Vulnerability Title
Missing offset validation leading to Out-of-Bounds Read in FreeRDP
Source: NVD (National Vulnerability Database)
Vulnerability Description
FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. In affected versions a missing offset validation may lead to an Out Of Bound Read in the function `gdi_multi_opaque_rect`. In particular there is no code to validate if the value `multi_opaque_rect->numRectangles` is less than 45. Looping through `multi_opaque_rect->`numRectangles without proper boundary checks can lead to Out-of-Bounds Read errors which will likely lead to a crash. This issue has been addressed in versions 2.11.0 and 3.0.0-beta3. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存读
Source: NVD (National Vulnerability Database)
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 gdi_multi_opaque_rect 函数中缺少偏移量验证导致越界读取。
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-2023-39356
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- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-q5v5-qhj5-mh6mx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2023-39356
Same Patch Batch · FreeRDP · 2023-08-31 · 17 CVEs total
| CVE-2023-40187 | 7.3 HIGH | Use-After-Free in FreeRDP |
| CVE-2023-39355 | 7.0 HIGH | FreeRDP Use-After-Free in RDPGFX_CMDID_RESETGRAPHICS |
| CVE-2023-40567 | 6.5 MEDIUM | Out-Of-Bounds Write in FreeRDP |
| CVE-2023-40569 | 6.5 MEDIUM | Out-Of-Bounds Write in FreeRDP |
| CVE-2023-40574 | 6.5 MEDIUM | Out-Of-Bounds Write in FreeRDP |
| CVE-2023-40186 | 6.5 MEDIUM | IntegerOverflow leading to Out-Of-Bound Write Vulnerability in FreeRDP |
| CVE-2023-39354 | 5.9 MEDIUM | FreeRDP Out-Of-Bounds Read in nsc_rle_decompress_data |
| CVE-2023-39350 | 5.9 MEDIUM | Incorrect offset calculation leading to denial of service in FreeRDP |
| CVE-2023-40576 | 5.3 MEDIUM | Out-Of-Bounds Read in FreeRDP |
| CVE-2023-40575 | 5.3 MEDIUM | Out-Of-Bounds Read in FreeRDP |
| CVE-2023-40188 | 5.3 MEDIUM | Out-Of-Bounds Read in FreeRDP |
| CVE-2023-40181 | 5.3 MEDIUM | Integer-Underflow leading to Out-Of-Bound Read in FreeRDP |
| CVE-2023-39352 | 5.3 MEDIUM | Invalid offset validation leading to Out Of Bound Write in FreeRDP |
| CVE-2023-39353 | 5.3 MEDIUM | Missing offset validation leading to Out Of Bound Read in FreeRDP |
| CVE-2023-39351 | 5.3 MEDIUM | FreeRDP Null Pointer Dereference leading denial of service |
| CVE-2023-40589 | 4.3 MEDIUM | FreeRDP Global-Buffer-Overflow in ncrush_decompress |
IV. Related Vulnerabilities
Same product: FreeRDP
- CVE-2026-40254
FreeRDP: contains_dotdot() off-by-one allows drive channel p - CVE-2026-33995
FreeRDP: Possible double free in kerberos_AcceptSecurityCont - CVE-2026-33987
FreeRDP: Persistent Cache bmpSize Desync - Heap OOB Write - CVE-2026-33986
FreeRDP: H.264 YUV Buffer Dimension Desync - Heap OOB Write - CVE-2026-33985
FreeRDP: ClearCodec Glyph Cache Count Desync - Heap OOB Read
Same vendor: FreeRDP
- CVE-2026-40254
FreeRDP: contains_dotdot() off-by-one allows drive channel p - CVE-2026-33995
FreeRDP: Possible double free in kerberos_AcceptSecurityCont - CVE-2026-33987
FreeRDP: Persistent Cache bmpSize Desync - Heap OOB Write - CVE-2026-33986
FreeRDP: H.264 YUV Buffer Dimension Desync - Heap OOB Write - CVE-2026-33985
FreeRDP: ClearCodec Glyph Cache Count Desync - Heap OOB Read
Same weakness: CWE-125
- CVE-2026-8177
XML::LibXML versions through 2.0210 for Perl read out-of-bou - CVE-2026-6104
Global buffer over-read in mb_convert_encoding() with attack - CVE-2026-7258
Out-of-bounds read in urldecode() on NetBSD - CVE-2026-8186
Open5GS NF client.c ogs_sbi_client_send_via_scp_or_sepp out- - CVE-2026-3508
ASUS System Control Interface 缓冲区错误漏洞
V. Comments for CVE-2023-39356
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