https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Fri, 02 Oct 2026 10:39:57 +0000 https://vulnerability.circl.lu/vuln/fkie_cve-2026-76840 <p>RustDesk&#39;s Windows clipboard redirection copies a peer-supplied length into a fixed-size caller buffer without an upper bound check. When an OLE paste consumer such as explorer.exe calls IStream::Read with a buffer of cb bytes, CliprdrStream_Read in libs/clipboard/src/windows/wf_cliprdr.c requests that many bytes of a remote file through cliprdr_send_request_filecontents and then executes CopyMemory(pv, clipboard-&gt;req_fdata, clipboard-&gt;req_fsize), where req_fsize is taken verbatim from the peer&#39;s CLIPRDR FileContentsResponse by wf_cliprdr_server_file_contents_response (req_fsize = fileContentsResponse-&gt;cbRequested) and is never clamped to cb anywhere in the chain. The function&#39;s only length comparison, req_fsize &lt; cb, handles the short-read case and is evaluated after the copy has already occurred. A malicious or compromised peer that answers a small file-contents read with an oversized response therefore writes attacker-chosen data past the end of the paste consumer&#39;s heap buffer when the local user pastes clipboard file contents offered by the remote side. The file is a fork of FreeRDP&#39;s client/Windows/wf_cliprdr.c, where the same defect is CVE-2026-68579, fixed in FreeRDP 3.30.0.</p> <p>RustDesk&#39;s Windows clipboard redirection copies a peer-supplied length into a fixed-size caller buffer without an upper bound check. When an OLE paste consumer such as explorer.exe calls IStream::Read with a buffer of cb bytes, CliprdrStream_Read in libs/clipboard/src/windows/wf_cliprdr.c requests that many bytes of a remote file through cliprdr_send_request_filecontents and then executes CopyMemory(pv, clipboard-&gt;req_fdata, clipboard-&gt;req_fsize), where req_fsize is taken verbatim from the peer&#39;s CLIPRDR FileContentsResponse by wf_cliprdr_server_file_contents_response (req_fsize = fileContentsResponse-&gt;cbRequested) and is never clamped to cb anywhere in the chain. The function&#39;s only length comparison, req_fsize &lt; cb, handles the short-read case and is evaluated after the copy has already occurred. A malicious or compromised peer that answers a small file-contents read with an oversized response therefore writes attacker-chosen data past the end of the paste consumer&#39;s heap buffer when the local user pastes clipboard file contents offered by the remote side. The file is a fork of FreeRDP&#39;s client/Windows/wf_cliprdr.c, where the same defect is CVE-2026-68579, fixed in FreeRDP 3.30.0.</p> https://vulnerability.circl.lu/vuln/fkie_cve-2026-76840 https://vulnerability.circl.lu/vuln/ghsa-8m44-j2jr-wmrp <p>RustDesk&#39;s Windows clipboard redirection copies a peer-supplied length into a fixed-size caller buffer without an upper bound check. When an OLE paste consumer such as explorer.exe calls IStream::Read with a buffer of cb bytes, CliprdrStream_Read in libs/clipboard/src/windows/wf_cliprdr.c requests that many bytes of a remote file through cliprdr_send_request_filecontents and then executes CopyMemory(pv, clipboard-&gt;req_fdata, clipboard-&gt;req_fsize), where req_fsize is taken verbatim from the peer&#39;s CLIPRDR FileContentsResponse by wf_cliprdr_server_file_contents_response (req_fsize = fileContentsResponse-&gt;cbRequested) and is never clamped to cb anywhere in the chain. The function&#39;s only length comparison, req_fsize &lt; cb, handles the short-read case and is evaluated after the copy has already occurred. A malicious or compromised peer that answers a small file-contents read with an oversized response therefore writes attacker-chosen data past the end of the paste consumer&#39;s heap buffer when the local user pastes clipboard file contents offered by the remote side. The file is a fork of FreeRDP&#39;s client/Windows/wf_cliprdr.c, where the same defect is CVE-2026-68579, fixed in FreeRDP 3.30.0.</p> <p>RustDesk&#39;s Windows clipboard redirection copies a peer-supplied length into a fixed-size caller buffer without an upper bound check. When an OLE paste consumer such as explorer.exe calls IStream::Read with a buffer of cb bytes, CliprdrStream_Read in libs/clipboard/src/windows/wf_cliprdr.c requests that many bytes of a remote file through cliprdr_send_request_filecontents and then executes CopyMemory(pv, clipboard-&gt;req_fdata, clipboard-&gt;req_fsize), where req_fsize is taken verbatim from the peer&#39;s CLIPRDR FileContentsResponse by wf_cliprdr_server_file_contents_response (req_fsize = fileContentsResponse-&gt;cbRequested) and is never clamped to cb anywhere in the chain. The function&#39;s only length comparison, req_fsize &lt; cb, handles the short-read case and is evaluated after the copy has already occurred. A malicious or compromised peer that answers a small file-contents read with an oversized response therefore writes attacker-chosen data past the end of the paste consumer&#39;s heap buffer when the local user pastes clipboard file contents offered by the remote side. The file is a fork of FreeRDP&#39;s client/Windows/wf_cliprdr.c, where the same defect is CVE-2026-68579, fixed in FreeRDP 3.30.0.</p> https://vulnerability.circl.lu/vuln/ghsa-8m44-j2jr-wmrp