| Name | CVE-2018-20022 |
| Description | LibVNC 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 |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-1617-1, DLA-1979-1, DLA-2016-1, DLA-2045-1, DSA-4383-1 |
| Debian Bugs | 916941, 945827 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| libvncserver (PTS) | buster | 0.9.11+dfsg-1.3+deb10u4 | fixed |
| buster (security) | 0.9.11+dfsg-1.3+deb10u5 | fixed | |
| bullseye | 0.9.13+dfsg-2+deb11u1 | fixed | |
| sid, trixie, bookworm | 0.9.14+dfsg-1 | fixed | |
| ssvnc (PTS) | buster | 1.0.29-4+deb10u1 | fixed |
| bullseye | 1.0.29-5 | fixed | |
| sid, trixie, bookworm | 1.0.29-6 | fixed | |
| tightvnc (PTS) | buster | 1:1.3.9-9+deb10u1 | fixed |
| bullseye | 1:1.3.10-3 | fixed | |
| sid, trixie, bookworm | 1:1.3.10-7 | fixed | |
| veyon (PTS) | buster | 4.1.7+repack1-1 | fixed |
| bullseye | 4.5.3+repack1-1 | fixed | |
| sid, trixie, bookworm | 4.7.5+repack1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| italc | source | jessie | 1:2.0.2+dfsg1-2+deb8u1 | DLA-1979-1 | ||
| italc | source | stretch | 1:3.0.3+dfsg1-1+deb9u1 | |||
| italc | source | (unstable) | (unfixed) | |||
| libvncserver | source | jessie | 0.9.9+dfsg2-6.1+deb8u4 | DLA-1617-1 | ||
| libvncserver | source | stretch | 0.9.11+dfsg-1.3~deb9u1 | DSA-4383-1 | ||
| libvncserver | source | (unstable) | 0.9.11+dfsg-1.2 | 916941 | ||
| ssvnc | source | jessie | 1.0.29-2+deb8u1 | DLA-2016-1 | ||
| ssvnc | source | stretch | 1.0.29-3+deb9u1 | |||
| ssvnc | source | buster | 1.0.29-4+deb10u1 | |||
| ssvnc | source | (unstable) | 1.0.29-5 | 945827 | ||
| tightvnc | source | jessie | 1.3.9-6.5+deb8u1 | DLA-2045-1 | ||
| tightvnc | source | stretch | 1:1.3.9-9+deb9u1 | |||
| tightvnc | source | buster | 1:1.3.9-9deb10u1 | |||
| tightvnc | source | (unstable) | 1:1.3.9-9.1 | |||
| veyon | source | (unstable) | 4.1.4+repack1-1 |
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/