Out-of-bounds Write The advisory has been revoked - it doesn't affect any version of package libvncserver (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU2010-LIBVNCSERVER-1032152
- published30 Jan 2019
- disclosed30 Jan 2019
Introduced: 30 Jan 2019
CVE-2018-20748 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:20.10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libvncserver package and not the libvncserver package as distributed by Ubuntu.
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
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-20748
- https://lists.debian.org/debian-lts-announce/2019/01/msg00029.html
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
- https://security-tracker.debian.org/tracker/CVE-2018-20748
- 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://www.openwall.com/lists/oss-security/2018/12/10/8
- https://usn.ubuntu.com/4547-1/
- https://usn.ubuntu.com/4587-1/
- https://usn.ubuntu.com/3877-1/
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf