Jervis Has a SHA-256 Hex String Padding Bug

高 7.5CVE-2025-68702 · GHSA-67rj-pjg6-pq59 · 13/01/2026 公開 · 17/06/2026 更新

要点

CVE-2025-68702 は net.gleske:jervis, jervis (samrocketman) に影響する深刻度「高」 (CVSS 7.5) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.17%（全脆弱性の 7.0% より高い）。
対処：2.2 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
net.gleske:jervis Maven	`< 2.2`	`2.2`
jervis samrocketman	`< 2.2`	`2.2`

概要

Vulnerability

https://github.com/samrocketman/jervis/blob/157d2b63ffa5c4bb1d8ee2254950fd2231de2b05/src/main/groovy/net/gleske/jervis/tools/SecurityIO.groovy#L622-L626

padLeft(32, '0') should be padLeft(64, '0'). SHA-256 produces 32 bytes = 64 hex characters.

Impact

Inconsistent hash lengths when leading bytes are zero
Comparison failures for hashes with leading zeros
Potential security issues in hash-based comparisons
Could cause subtle bugs in systems relying on consistent hash lengths

Severity is considered low for internal uses of this library but if there's any consumer using these methods directly then this is considered high.

Patches

Upgrade to Jervis 2.2.

Workarounds

Use an alternate SHA-256 hash function or upgrade.

NVD の説明

Jervis is a library for Job DSL plugin scripts and shared Jenkins pipeline libraries. Prior to 2.2, Jervis uses padLeft(32, '0') when it should use padLeft(64, '0') because SHA-256 produces 32 bytes which equates to 64 hex characters. This vulnerability is fixed in 2.2.