Buffer overflow in Apache Guacamole
CVE-2020-9498
Apache Guacamole 1.1.0 and older may mishandle pointers involved inprocessing data received via RDP static virtual channels. If a userconnects to a malicious or compromised RDP server, a series ofspecially-crafted PDUs could result in memory corruption, possiblyallowing arbitrary code to be executed with the privileges of therunning guacd process.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · 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/rff824b38ebd2fddc726b816f0e509696b83b9f78979d0cd02… (Mailing List, Third Party Advisory)
- lists.apache.org/thread.html/r26fb170edebff842c74aacdb1333c1338f0e19e5ec7854d72… (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)
- lists.apache.org/thread.html/r1125f3044a0946d1e7e6f125a6170b58d413ebd4a95157e46… (mailing-list)
Frequently asked questions
- What is CVE-2020-9498?
- CVE-2020-9498 is a medium-severity vulnerability in Apache Guacamole, classified under Out-of-bounds Write. CVSS score: 6.7/10. Published 2020-07-02.
- How severe is CVE-2020-9498?
- Medium severity. CVSS v3 base score is 6.7 out of 10.