Integer overflow in Apache Guacamole
CVE-2023-43826
Apache Guacamole 1.5.3 and older do not consistently ensure that values received from a VNC server will not result in integer overflow. If a user connects to a malicious or compromised VNC server, specially-crafted data could result in memory corruption, possibly allowing arbitrary code to be executed with the privileges of the running guacd process. Users are recommended to upgrade to version 1.5.4, which fixes this issue.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (57.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Apache Guacamole
- Apache Software Foundation Guacamole — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.apache.org/thread/23gzwftpfgtq97tj6ttmbclry53kmwv6 (vendor-advisory, Mailing List, Vendor Advisory)
- www.openwall.com/lists/oss-security/2023/12/19/4 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-43826?
- CVE-2023-43826 is a high-severity vulnerability in Apache Guacamole, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2023-12-19.
- How severe is CVE-2023-43826?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2023-43826 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.