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Debian LTS: Security Advisory for libvncserver (DLA-2264-1)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update for the 'libvncserver' package(s) announced via the DLA-2264-1 advisory.
Insight
Insight
Several vulnerabilities have been discovered in libVNC (libvncserver Debian package), an implemenantation of the VNC server and client protocol. CVE-2019-20839 libvncclient/sockets.c in LibVNCServer had a buffer overflow via a long socket filename. CVE-2020-14397 libvncserver/rfbregion.c had a NULL pointer dereference. CVE-2020-14399 Byte-aligned data was accessed through uint32_t pointers in libvncclient/rfbproto.c. CVE-2020-14400 Byte-aligned data was accessed through uint16_t pointers in libvncserver/translate.c. CVE-2020-14401 libvncserver/scale.c had a pixel_value integer overflow. CVE-2020-14402 libvncserver/corre.c allowed out-of-bounds access via encodings. CVE-2020-14403 libvncserver/hextile.c allowed out-of-bounds access via encodings. CVE-2020-14404 libvncserver/rre.c allowed out-of-bounds access via encodings. CVE-2020-14405 libvncclient/rfbproto.c does not limit TextChat size.
Affected Software
Affected Software
'libvncserver' package(s) on Debian Linux.
Detection Method
Detection Method
Checks if a vulnerable package version is present on the target host.
Solution
Solution
For Debian 8 'Jessie', these problems have been fixed in version 0.9.9+dfsg2-6.1+deb8u8. We recommend that you upgrade your libvncserver packages.