fix(libvncserver): CVE-2026-32853 and CVE-2026-32854#3
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fix(libvncserver): CVE-2026-32853 and CVE-2026-32854#3deepin-ci-robot wants to merge 3 commits intomasterfrom
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Fix heap out-of-bounds read in UltraZip encoding handler. HandleUltraZipBPP() iterates over sub-rectangles without validating that the pointer stays within the decompressed data buffer. A malicious server can set a large numCacheRects value, causing heap out-of-bounds reads. Upstream: LibVNC/libvncserver@009008e Generated-By: glm-5.1 Co-Authored-By: hudeng <hudeng@deepin.org>
Fix null pointer dereference in HTTP proxy handlers. httpProcessInput() passes the return value of strchr() to atoi() and strncmp() without checking for NULL. If a CONNECT request contains no colon, or a GET request contains no slash, strchr() returns NULL, leading to a segmentation fault. Upstream: LibVNC/libvncserver@dc78dee Generated-By: glm-5.1 Co-Authored-By: hudeng <hudeng@deepin.org>
Generated-By: glm-5.1 Co-Authored-By: hudeng <hudeng@deepin.org>
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CVE 修复
CVE IDs: CVE-2026-32853, CVE-2026-32854
CVE-2026-32853
漏洞描述: Heap out-of-bounds read vulnerability in UltraZip encoding handler
影响版本: LibVNCServer 0.9.15 and prior
修复方案: Add bounds checks to UltraZip subrectangle parsing
上游链接: LibVNC/libvncserver@009008e
验证状态: ✅ Patches applied successfully, only debian/ modified
CVE-2026-32854
漏洞描述: NULL pointer dereference in HTTP proxy handlers
影响版本: LibVNCServer 0.9.15 and prior
修复方案: Add NULL checks before using strchr() return values
上游链接: LibVNC/libvncserver@dc78dee
验证状态: ✅ Patches applied successfully, only debian/ modified
修复方式: backport-upstream
Generated by: CVE-Fixer Agent
Co-Authored-By: hudeng hudeng@deepin.org