جزئیات آسیبپذیری
CVE-2026-31806
FreeRDP has a Heap Buffer Overflow in nsc_process_message() via Unchecked SURFACE_BITS_COMMAND Bitmap Dimensions
شرح رسمی (انگلیسی)
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, the gdi_surface_bits() function processes SURFACE_BITS_COMMAND messages sent by the RDP server. When the command is handled using NSCodec, the bmp.width and bmp.height values provided by the server are not properly validated against the actual desktop dimensions. A malicious RDP server can supply crafted bmp.width and bmp.height values that exceed the expected surface size. Because these values are used during bitmap decoding and memory operations without proper bounds checking, this can lead to a heap buffer overflow. Since the attacker can also control the associated pixel data transmitted by the server, the overflow may be exploitable to overwrite adjacent heap memory. This vulnerability is fixed in 3.24.0.
امتیازهای CVSS
| امتیاز | نسخه | منبع | بردار |
|---|---|---|---|
| 9.3بحرانی | 4.0 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| 8.8بالا | 3.1 | CVEProject cvelistV5 (CNA) (redhat-SADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
محصولات آسیبپذیر
| فروشنده | محصول | نسخهها | منبع |
|---|---|---|---|
| FreeRDP | FreeRDP | < 3.24.0 | CVEProject cvelistV5 (CNA) |
منابع و راهنماها
۱۹- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rrqm-46rj-cmx2 x_refsource_CONFIRM
- https://github.com/FreeRDP/FreeRDP/commit/83d9aedea278a74af3e490ff5eeb889c016dbb2b x_refsource_MISC
- https://access.redhat.com/security/cve/CVE-2026-31806 vdb-entryx_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2447376 issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31806.json x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:11323 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:6743 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:6799 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:19033 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:6918 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:10734 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:10735 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:10951 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:10076 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:9640 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:9641 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:6958 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:6727 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:6340 vendor-advisoryx_refsource_REDHAT
اطلاعات
- تاریخ انتشار
- ۱۴۰۴/۱۲/۲۲
- آخرین بهروزرسانی
- ۱۴۰۵/۰۴/۲۴
- وضعیت
- منتشرشده
- صادرکننده (CNA)
- GitHub_M
پیشبینی بهرهبرداری (EPSS)
ارزیابی SSVC (CISA)
- قابل خودکارسازی
- بله
- وضعیت بهرهبرداری
- ندارد
- اثر فنی
- کامل
ضعفها (CWE)
- CWE-122Heap-based Buffer Overflow
- CWE-131Incorrect Calculation of Buffer Size