Out-of-bounds Read in Tigervnc
CVE-2023-6377
A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or possible remote code execution in cases where X11 forwarding is involved.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.016 (74.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: -0.000
Affected products
- Tigervnc
- X.org X Server
- X.org Xwayland
- Debian Linux — versions 10.0, 11.0, 12.0
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 6 Extended Lifecycle Support - Extension — versions 0:1.1.0-25.el6_10.14
- Red Hat Enterprise Linux 7 — versions 0:1.8.0-28.el7_9, 0:1.20.4-25.el7_9
- Red Hat Enterprise Linux 8 — versions 0:1.13.1-2.el8_9.4, 0:1.20.11-22.el8, 0:21.1.3-15.el8
- Red Hat Enterprise Linux 8.2 Advanced Update Support — versions 0:1.9.0-15.el8_2.6
- Red Hat Enterprise Linux 8.2 Telecommunications Update Service — versions 0:1.9.0-15.el8_2.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2023:7886 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2024:0006 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:0009 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:0010 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:0014 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:0015 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:0016 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:0017 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:0018 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:0020 (vendor-advisory)
Frequently asked questions
- What is CVE-2023-6377?
- CVE-2023-6377 is a high-severity vulnerability in Tigervnc, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2023-12-13.
- How severe is CVE-2023-6377?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2023-6377 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.