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CVE-2019-15681

Status Candidate

Overview

LibVNC commit before d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a contains a memory leak (CWE-655) in VNC server code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appear to be exploitable via network connectivity. These vulnerabilities have been fixed in commit d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a.

Related Files

Ubuntu Security Notice USN-4587-1
Posted Oct 21, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4587-1 - Nicolas Ruff discovered that iTALC had buffer overflows, divide-by-zero errors and didn't check malloc return values. A remote attacker could use these issues to cause a denial of service or possibly execute arbitrary code. Josef Gajdusek discovered that iTALC had heap-based buffer overflow vulnerabilities. A remote attacker could used these issues to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, remote, denial of service, overflow, arbitrary, vulnerability
systems | linux, ubuntu
advisories | CVE-2014-6051, CVE-2014-6055, CVE-2018-20019, CVE-2018-20020, CVE-2018-20023, CVE-2018-20024, CVE-2018-20748, CVE-2018-20750, CVE-2019-15681
MD5 | a0940d2ea11a0ed386f0828fbb1f40c5
Ubuntu Security Notice USN-4573-1
Posted Oct 7, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4573-1 - Nicolas Ruff discovered that Vino incorrectly handled large ClientCutText messages. A remote attacker could use this issue to cause the server to crash, resulting in a denial of service. It was discovered that Vino incorrectly handled certain packet lengths. A remote attacker could possibly use this issue to obtain sensitive information, cause a denial of service, or execute arbitrary code. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2014-6053, CVE-2018-7225, CVE-2019-15681, CVE-2020-14397, CVE-2020-14402, CVE-2020-14403, CVE-2020-14404
MD5 | b820dbcb8494dae534a235f1446d17cb
Ubuntu Security Notice USN-4547-1
Posted Sep 28, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4547-1 - It was discovered that an information disclosure vulnerability existed in the LibVNCServer vendored in iTALC when sending a ServerCutText message. An attacker could possibly use this issue to expose sensitive information. It was discovered that the LibVNCServer and LibVNCClient vendored in iTALC incorrectly handled certain packet lengths. A remote attacker could possibly use this issue to obtain sensitive information, cause a denial of service, or execute arbitrary code. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, info disclosure
systems | linux, ubuntu
advisories | CVE-2018-15127, CVE-2018-20022, CVE-2018-20023, CVE-2018-20024, CVE-2018-20749, CVE-2018-7225, CVE-2019-15681
MD5 | 9922e4b06254766557616cfff60d0f5a
Ubuntu Security Notice USN-4407-1
Posted Jul 2, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4407-1 - It was discovered that LibVNCServer incorrectly handled decompressing data. An attacker could possibly use this issue to cause LibVNCServer to crash, resulting in a denial of service. It was discovered that an information disclosure vulnerability existed in LibVNCServer when sending a ServerCutText message. An attacker could possibly use this issue to expose sensitive information. This issue only affected Ubuntu 19.10, Ubuntu 18.04 LTS, and Ubuntu 16.04 LTS. Various other issues were also addressed.

tags | advisory, denial of service, info disclosure
systems | linux, ubuntu
advisories | CVE-2017-18922, CVE-2019-15680, CVE-2019-15681, CVE-2019-20788
MD5 | ab2befd375e9d3e5fb9cb009d5446e52
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