CVE-2018-20748
- Source
- https://cve.org/CVERecord?id=CVE-2018-20748
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20748.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2018-20748
- Downstream
- Related
- Published
- 2019-01-30T18:29:00.257Z
- Modified
- 2026-02-21T10:28:07.059920Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
LibVNC before 0.9.12 contains multiple heap out-of-bounds write vulnerabilities in libvncclient/rfbproto.c. The fix for CVE-2018-20019 was incomplete.
- References
-
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf
- https://github.com/LibVNC/libvncserver/commit/a64c3b37af9a6c8f8009d7516874b8d266b42bae
- https://github.com/LibVNC/libvncserver/commit/c2c4b81e6cb3b485fb1ec7ba9e7defeb889f6ba7
- https://github.com/LibVNC/libvncserver/commit/c5ba3fee85a7ecbbca1df5ffd46d32b92757bc2a
- https://github.com/LibVNC/libvncserver/commit/e34bcbb759ca5bef85809967a268fdf214c1ad2c
- https://github.com/LibVNC/libvncserver/issues/273
- https://lists.debian.org/debian-lts-announce/2019/01/msg00029.html
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
- https://usn.ubuntu.com/3877-1/
- https://usn.ubuntu.com/4547-1/
- https://usn.ubuntu.com/4587-1/
- https://www.openwall.com/lists/oss-security/2018/12/10/8
- https://github.com/LibVNC/libvncserver/issues/273
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf
- https://github.com/LibVNC/libvncserver/commit/a64c3b37af9a6c8f8009d7516874b8d266b42bae
- https://github.com/LibVNC/libvncserver/commit/c2c4b81e6cb3b485fb1ec7ba9e7defeb889f6ba7
- https://github.com/LibVNC/libvncserver/commit/c5ba3fee85a7ecbbca1df5ffd46d32b92757bc2a
- https://github.com/LibVNC/libvncserver/commit/e34bcbb759ca5bef85809967a268fdf214c1ad2c
- https://lists.debian.org/debian-lts-announce/2019/01/msg00029.html
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
- https://www.openwall.com/lists/oss-security/2018/12/10/8
- https://www.openwall.com/lists/oss-security/2018/12/10/8
Affected packages
Git / github.com/libvnc/libvncserver
Affected ranges
- Type
- GIT
- Repo
- https://github.com/libvnc/libvncserver
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedIntroduced0 Unknown introduced commit / All previous commits are affectedFixedIntroduced0 Unknown introduced commit / All previous commits are affectedFixedIntroduced0 Unknown introduced commit / All previous commits are affectedFixed
Affected versions
LibVNCServer-0.*
LibVNCServer-0.9.10
LibVNCServer-0.9.11
LibVNCServer-0.9.8
LibVNCServer-0.9.9
Other
X11VNC_0_9_10
X11VNC_0_9_11
X11VNC_0_9_12
X11VNC_0_9_7
X11VNC_0_9_8
X11VNC_0_9_9
X11VNC_REL_0_9_4
X11VNC_REL_0_9_5
X11VNC_REL_0_9_6
Database specific
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20748.json"
vanir_signatures
[
{
"id": "CVE-2018-20748-08854b13",
"target": {
"function": "HandleRFBServerMessage",
"file": "libvncclient/rfbproto.c"
},
"signature_version": "v1",
"deprecated": false,
"source": "https://github.com/libvnc/libvncserver/commit/c5ba3fee85a7ecbbca1df5ffd46d32b92757bc2a",
"digest": {
"function_hash": "12073792519026169399055785631219693532",
"length": 15576.0
},
"signature_type": "Function"
},
{
"id": "CVE-2018-20748-0b22567d",
"target": {
"file": "libvncclient/rfbproto.c"
},
"signature_version": "v1",
"deprecated": false,
"source": "https://github.com/libvnc/libvncserver/commit/c5ba3fee85a7ecbbca1df5ffd46d32b92757bc2a",
"digest": {
"threshold": 0.9,
"line_hashes": [
"270509393327960365748685557792116831529",
"339080614919184849562659400147945780071",
"64130665682880843821983036439133378936"
]
},
"signature_type": "Line"
}
]