Improper input validation in Apache Guacamole
CVE-2020-9497
Apache Guacamole 1.1.0 and older do not properly validate datareceived from RDP servers via static virtual channels. If a userconnects to a malicious or compromised RDP server, specially-craftedPDUs could result in disclosure of information within the memory ofthe guacd process handling the connection.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.008 (54.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: -0.000
Affected products
- Apache Guacamole
- Debian Linux — versions 9.0
- Fedoraproject Fedora — versions 32, 33
- Apache Guacamole — versions Apache Guacamole 1.1.0 and older
Weakness classification (CWE)
References
- lists.apache.org/thread.html/r65f75d3d65d1af68141f42071ebb27dda24af3e45570e593c… (Mailing List, Vendor Advisory)
- lists.apache.org/thread.html/r3f071de70ea1facd3601e0fa894e6cadc960627ee7199437b… (mailing-list)
- lists.apache.org/thread.html/r066543f0565e97b27c0dfe27e93e8a387b99e1e3576400022… (mailing-list)
- lists.apache.org/thread.html/r181b1d5b1acb31cfa69f41b2c86ed3a2cb0b5bc09c2cbd31e… (mailing-list)
- research.checkpoint.com/2020/apache-guacamole-rce/ (Third Party Advisory)
- kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44525 (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/11/msg00010.html (mailing-list, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.apache.org/thread.html/r90890afea72a9571d666820b2fe5942a0a5f86be406fa31da… (mailing-list)
Frequently asked questions
- What is CVE-2020-9497?
- CVE-2020-9497 is a medium-severity vulnerability in Apache Guacamole, classified under Improper Input Validation. CVSS score: 4.4/10. Published 2020-07-02.
- How severe is CVE-2020-9497?
- Medium severity. CVSS v3 base score is 4.4 out of 10.