Detections
Analytics
CVE-2020-9484
high
Description
When using Apache Tomcat versions 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to 9.0.34, 8.5.0 to 8.5.54 and 7.0.0 to 7.0.103 if a) an attacker is able to control the contents and name of a file on the server; and b) the server is configured to use the PersistenceManager with a FileStore; and c) the PersistenceManager is configured with sessionAttributeValueClassNameFilter="null" (the default unless a SecurityManager is used) or a sufficiently lax filter to allow the attacker provided object to be deserialized; and d) the attacker knows the relative file path from the storage location used by FileStore to the file the attacker has control over; then, using a specifically crafted request, the attacker will be able to trigger remote code execution via deserialization of the file under their control. Note that all of conditions a) to d) must be true for the attack to succeed.
References
https://www.oracle.com/security-alerts/cpuoct2021.html
https://www.oracle.com/security-alerts/cpuoct2020.html
https://www.oracle.com/security-alerts/cpujul2020.html
https://www.oracle.com/security-alerts/cpujan2022.html
https://www.oracle.com/security-alerts/cpujan2021.html
https://www.oracle.com/security-alerts/cpuApr2021.html
https://www.oracle.com//security-alerts/cpujul2021.html
https://www.debian.org/security/2020/dsa-4727
https://usn.ubuntu.com/4596-1/
https://usn.ubuntu.com/4448-1/
https://security.netapp.com/advisory/ntap-20200528-0005/
https://security.gentoo.org/glsa/202006-21
https://lists.debian.org/debian-lts-announce/2020/07/msg00010.html
https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html
https://lists.debian.org/debian-lts-announce/2020/05/msg00020.html
https://kc.mcafee.com/corporate/index?page=content&id=SB10332
http://www.openwall.com/lists/oss-security/2021/03/01/2
http://seclists.org/fulldisclosure/2020/Jun/6
http://packetstormsecurity.com/files/157924/Apache-Tomcat-CVE-2020-9484-Proof-Of-Concept.html
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00057.html
https://github.com/Raneem03/cve-analysis-exploitation-mitigation
https://github.com/beghorra/tetragon-tomcat-cve
https://github.com/trishab0807-lgtm/home-network-scanner
https://github.com/deathquote/CVE-2020-9484
https://github.com/0dayCTF/CVE-2020-9484
https://github.com/d3fudd/CVE-2020-9484_Exploit
https://github.com/caique-garbim/CVE-2020-9484_Exploit
https://github.com/advisories/GHSA-9f3j-pm6f-9fm5
https://github.com/RepublicR0K/CVE-2020-9484
https://github.com/advisories/GHSA-jgwr-3qm3-26f3
https://github.com/psauxx/-CVE-2020-9484
https://github.com/psauxx/-CVE-2020-9484-
https://github.com/osamahamad/CVE-2020-9484-Mass-Scan
https://github.com/advisories/GHSA-344f-f5vg-2jfj
https://github.com/seanachao/CVE-2020-9484
https://github.com/threedr3am/tomcat-cluster-session-sync-exp