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CVE-2014-8240

tigervnc: integer overflow flaw, leading to a heap-based buffer overflow in screen size handling

Integer overflow in TigerVNC allows remote VNC servers to cause a denial of service (crash) and possibly execute arbitrary code via vectors related to screen size handling, which triggers a heap-based buffer overflow, a similar issue to CVE-2014-6051.

CVSS 2.0 · 7.5 High EPSS 3.5% KEV · Not listed
Vendors
Redhat Tigervnc
Products
Enterprise Linux Tigervnc
CVE-2011-1775

tigervnc: vncviewer can send password to server without proper validation of the X.509 certificate

The CSecurityTLS::processMsg function in common/rfb/CSecurityTLS.cxx in the vncviewer component in TigerVNC 1.1beta1 does not properly verify the server's X.509 certificate, which allows man-in-the-middle attackers to spoof a TLS VNC server via an arbitrary certificate.

CVSS 2.0 · 5.8 Medium EPSS 1.3% KEV · Not listed
Vendors
Redhat Tigervnc
Products
Enterprise Linux Tigervnc
CVE-2020-26117

tigervnc: certificate exceptions stored as authorities

In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate exceptions. They store the certificates as authorities, meaning that the owner of a certificate could impersonate any server after a client had added an exception.

CVSS 3.1 · 8.1 High EPSS 3.1% KEV · Not listed
Vendors
Debian Opensuse Redhat and 1 more
Products
Debian Linux Leap Enterprise Linux and 1 more
CVE-2019-15695

tigervnc: Stack buffer overflow in CMsgReader::readSetCursor

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.

CVSS 3.1 · 7.2 High EPSS 4.5% KEV · Not listed
Vendors
Opensuse Redhat Tigervnc
Products
Leap Enterprise Linux Tigervnc
CVE-2019-15694

tigervnc: Heap buffer overflow in DecodeManager::decodeRect

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.

CVSS 3.1 · 7.2 High EPSS 4.5% KEV · Not listed
Vendors
Opensuse Redhat Tigervnc
Products
Leap Enterprise Linux Tigervnc
CVE-2019-15693

tigervnc: Heap buffer overflow in TightDecoder::FilterGradient

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.

CVSS 3.1 · 7.2 High EPSS 4.3% KEV · Not listed
Vendors
Redhat Tigervnc
Products
Enterprise Linux Tigervnc
CVE-2019-15692

tigervnc: Heap buffer overflow triggered from CopyRectDecoder due to incorrect value checks

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.

CVSS 3.1 · 7.2 High EPSS 4.8% KEV · Not listed
Vendors
Opensuse Redhat Tigervnc
Products
Leap Enterprise Linux Tigervnc
CVE-2019-15691

tigervnc: Stack use-after-return due to incorrect usage of stack memory in ZRLEDecoder

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.

CVSS 3.1 · 7.2 High EPSS 4.7% KEV · Not listed
Vendors
Opensuse Redhat Tigervnc
Products
Leap Enterprise Linux Tigervnc
CVE-2014-0011

tigervnc: ZRLE decoding heap-based buffer overflow in vncviewer

Multiple heap-based buffer overflows in the ZRLE_DECODE function in common/rfb/zrleDecode.h in TigerVNC before 1.3.1, when NDEBUG is enabled, allow remote VNC servers to cause a denial of service (vncviewer crash) and possibly execute arbitrary code via vectors related to screen image rendering.

CVSS 3.1 · 9.8 Critical EPSS 2.5% KEV · Not listed
Vendors
Tigervnc
Products
Tigervnc