This High severity DoS (Denial of Service) vulnerability was introduced in versions 9.2.0, 9.3.0, 9.4.0, 9.5.0, 9.6.0, 10.0.0, 10.1.1, 10.2.0, 10.3.0, and 10.4.1 of Bitbucket Data Center.

This DoS (Denial of Service) vulnerability, with a CVSS Score of 8.7 and a CVSS Vector of
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Amber, allows an unauthenticated attacker to expose assets in
your environment susceptible to exploitation which has no impact to confidentiality, no impact to integrity, high impact
to availability, and requires no user interaction.

Atlassian recommends that Bitbucket Data Center customers upgrade to latest version, if you are unable to do so, upgrade
your instance to one of the specified supported fixed versions:

• 10.2: Upgrade to a release greater than or equal to 10.2.7
• 9.4: Upgrade to a release greater than or equal to 9.4.24

See the release notes (https://confluence.atlassian.com/bitbucketserver/release-notes). You can download the latest
version of Bitbucket Data Center from the download center
(https://www.atlassian.com/software/bitbucket/download-archives).

The National Vulnerability Database provides the following description for this vulnerability:

In Bouncy Castle for Java before 1.85, OER parser recurses without depth limit on self-referential IEEE 1609.2 schema.
This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before
bcutil-fips 2.0.7 (2.0.X series) and 2.1.7 (2.1.X series).