{"id":"MGASA-2020-0435","summary":"Updated italc packages fix security vulnerabilities","details":"An issue was discovered in LibVNCServer through 0.9.11.\nrfbProcessClientNormalMessage() in rfbserver.c does not sanitize msg.cct.length,\nleading to access to uninitialized and potentially sensitive data or possibly\nunspecified other impact (e.g., an integer overflow) via specially crafted\nVNC packets. (CVE-2018-7225)\n\nLibVNC before commit 502821828ed00b4a2c4bef90683d0fd88ce495de contains heap\nout-of-bound write vulnerability in server code of file transfer extension that\ncan result remote code execution. (CVE-2018-15127)\n\nLibVNC before commit a83439b9fbe0f03c48eb94ed05729cb016f8b72f contains multiple\nheap out-of-bound write vulnerabilities in VNC client code that can result\nremote code execution. (CVE-2018-20019)\n\nLibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap\nout-of-bound write vulnerability inside structure in VNC client code that can\nresult remote code execution. (CVE-2018-20020)\n\nLibVNC before commit c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c contains a CWE-835:\nInfinite loop vulnerability in VNC client code. Vulnerability allows attacker\nto consume excessive amount of resources like CPU and RAM. (CVE-2018-20021)\n\nLibVNC before 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 contains multiple\nweaknesses CWE-665: Improper Initialization vulnerability in VNC client code\nthat allows attacker to read stack memory and can be abuse for information\ndisclosure. Combined with another vulnerability, it can be used to leak stack\nmemory layout and in bypassing ASLR. (CVE-2018-20022)\n\nLibVNC before 8b06f835e259652b0ff026898014fc7297ade858 contains CWE-665:\nImproper Initialization vulnerability in VNC Repeater client code that allows\nattacker to read stack memory and can be abuse for information disclosure.\nCombined with another vulnerability, it can be used to leak stack memory layout\nand in bypassing ASLR. (CVE-2018-20023)\n\nLibVNC before commit 4a21bbd097ef7c44bb000c3bd0907f96a10e4ce7 contains null\npointer dereference in VNC client code that can result DoS. (CVE-2018-20024)\n\nLibVNC before 0.9.12 contains multiple heap out-of-bounds write vulnerabilities\nin libvncclient/rfbproto.c. The fix for CVE-2018-20019 was incomplete.\n(CVE-2018-20748)\n\nLibVNC before 0.9.12 contains a heap out-of-bounds write vulnerability in\nlibvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete.\n(CVE-2018-20749)\n\nLibVNC through 0.9.12 contains a heap out-of-bounds write vulnerability in\nlibvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete.\n(CVE-2018-20750)\n\nLibVNC commit before d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a contains a \nmemory leak (CWE-655) in VNC server code, which allow an attacker to read\nstack memory and can be abused for information disclosure. Combined with\nanother vulnerability, it can be used to leak stack memory and bypass ASLR.\nThis attack appear to be exploitable via network connectivity.\n(CVE-2019-15681)\n","modified":"2026-04-16T04:42:45.007668168Z","published":"2020-11-23T19:51:37Z","upstream":["CVE-2018-15127","CVE-2018-20019","CVE-2018-20020","CVE-2018-20021","CVE-2018-20022","CVE-2018-20023","CVE-2018-20024","CVE-2018-20748","CVE-2018-20749","CVE-2018-20750","CVE-2018-7225","CVE-2019-15681"],"references":[{"type":"ADVISORY","url":"https://advisories.mageia.org/MGASA-2020-0435.html"},{"type":"REPORT","url":"https://bugs.mageia.org/show_bug.cgi?id=27404"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4547-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4587-1"}],"affected":[{"package":{"name":"italc","ecosystem":"Mageia:7","purl":"pkg:rpm/mageia/italc?arch=source&distro=mageia-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.3-3.1.mga7"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2020-0435.json"}}],"schema_version":"1.7.5","credits":[{"name":"Mageia","contact":["https://wiki.mageia.org/en/Packages_Security_Team"],"type":"COORDINATOR"}]}