CVE-2018-20022

NameCVE-2018-20022
DescriptionLibVNC before 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 contains multiple weaknesses CWE-665: Improper Initialization vulnerability in VNC client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak stack memory layout and in bypassing ASLR
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-1617-1
NVD severitymedium (attack range: remote)
Debian Bugs916941

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libvncserver (PTS)jessie0.9.9+dfsg2-6.1+deb8u3vulnerable
jessie (security)0.9.9+dfsg2-6.1+deb8u4fixed
stretch (security), stretch0.9.11+dfsg-1+deb9u1vulnerable
buster, sid0.9.11+dfsg-1.2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libvncserversource(unstable)0.9.11+dfsg-1.2medium916941
libvncserversourcejessie0.9.9+dfsg2-6.1+deb8u4mediumDLA-1617-1

Notes

https://github.com/LibVNC/libvncserver/issues/252
https://github.com/LibVNC/libvncserver/commit/2f5b2ad1c6c99b1ac6482c95844a84d66bb52838
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-032-libvnc-multiple-memory-leaks/

Search for package or bug name: Reporting problems