VulnerabilityModified
CVE-2021-41079
When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet could be used to trigger an infinite loop resulting in a denial of service.
HIGH 7.5EPSS 7.18%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (7.18%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 10.0.2 did not properly validate incoming TLS packets. When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet could be used to trigger an infinite loop resulting in a denial of service.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 7.18% probability · 94th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20, CWE-835
- Affected
- apache/tomcat · debian/debian linux · netapp/management services for element software and netapp hci
- Source
- security@apache.org
References
- https://lists.apache.org/thread.html/r6b6b674e3f168dd010e67dbe6848b866e2acf26371452fdae313b98a%40%3Cusers.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rb4de81ac647043541a32881099aa6eb5a23f1b7fd116f713f8ab9dbe%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rccdef0349fdf4fb73a4e4403095446d7fe6264e0a58e2df5c6799434%40%3Cannounce.tomcat.apache.org%3EMailing List, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/09/msg00012.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211008-0005/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4986Third Party Advisory
- https://lists.apache.org/thread.html/r6b6b674e3f168dd010e67dbe6848b866e2acf26371452fdae313b98a%40%3Cusers.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rb4de81ac647043541a32881099aa6eb5a23f1b7fd116f713f8ab9dbe%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rccdef0349fdf4fb73a4e4403095446d7fe6264e0a58e2df5c6799434%40%3Cannounce.tomcat.apache.org%3EMailing List, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/09/msg00012.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211008-0005/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4986Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.