Source: tigervnc Version: 1.9.0+dfsg-4 Severity: grave Tags: security upstream Control: found -1 1.9.0+dfsg-3
Hi, The following vulnerabilities were published for tigervnc. CVE-2019-15691[0]: | TigerVNC version prior to 1.10.1 is vulnerable to stack use-after- | return, which occurs due to incorrect usage of stack memory in | ZRLEDecoder. If decoding routine would throw an exception, ZRLEDecoder | may try to access stack variable, which has been already freed during | the process of stack unwinding. Exploitation of this vulnerability | could potentially result into remote code execution. This attack | appear to be exploitable via network connectivity. CVE-2019-15692[1]: | TigerVNC version prior to 1.10.1 is vulnerable to heap buffer | overflow. Vulnerability could be triggered from CopyRectDecoder due to | incorrect value checks. Exploitation of this vulnerability could | potentially result into remote code execution. This attack appear to | be exploitable via network connectivity. CVE-2019-15693[2]: | TigerVNC version prior to 1.10.1 is vulnerable to heap buffer | overflow, which occurs in TightDecoder::FilterGradient. Exploitation | of this vulnerability could potentially result into remote code | execution. This attack appear to be exploitable via network | connectivity. CVE-2019-15694[3]: | TigerVNC version prior to 1.10.1 is vulnerable to heap buffer | overflow, which could be triggered from DecodeManager::decodeRect. | Vulnerability occurs due to the signdness error in processing | MemOutStream. Exploitation of this vulnerability could potentially | result into remote code execution. This attack appear to be | exploitable via network connectivity. CVE-2019-15695[4]: | TigerVNC version prior to 1.10.1 is vulnerable to stack buffer | overflow, which could be triggered from CMsgReader::readSetCursor. | This vulnerability occurs due to insufficient sanitization of | PixelFormat. Since remote attacker can choose offset from start of the | buffer to start writing his values, exploitation of this vulnerability | could potentially result into remote code execution. This attack | appear to be exploitable via network connectivity. If you fix the vulnerabilities please also make sure to include the CVE (Common Vulnerabilities & Exposures) ids in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2019-15691 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15691 [1] https://security-tracker.debian.org/tracker/CVE-2019-15692 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15692 [2] https://security-tracker.debian.org/tracker/CVE-2019-15693 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15693 [3] https://security-tracker.debian.org/tracker/CVE-2019-15694 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15694 [4] https://security-tracker.debian.org/tracker/CVE-2019-15695 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15695 Please adjust the affected versions in the BTS as needed. -- System Information: Debian Release: bullseye/sid APT prefers unstable APT policy: (500, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 5.3.0-3-amd64 (SMP w/2 CPU cores) Kernel taint flags: TAINT_WARN Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled
