Incorrect Handling of Non-Boolean Comparisons During Minification in uglify-js

严重 9.8CVE-2015-8857 · GHSA-34r7-q49f-h37c · Published 23/01/2017 · updated 17/06/2026

要点

CVE-2015-8857 是影响 uglifier, uglifyjs (uglifyjs project), uglify-js 的严重 (CVSS 9.8)漏洞。
未来 30 天内被利用的概率（EPSS）：3.6%，高于 89.4% 的漏洞。
修复：升级到 2.7.2, 2.4.24 或更高版本。

Package	Affected versions	Patched versions
uglifier RubyGems	`< 2.7.2`	`2.7.2`
uglifyjs uglifyjs_project	`< 2.4.24`	`2.4.24`
uglify-js npm	`< 2.4.24`	`2.4.24`

Description

Versions of uglify-js prior to 2.4.24 are affected by a vulnerability which may cause crafted JavaScript to have altered functionality after minification.

Recommendation

Upgrade UglifyJS to version >= 2.4.24.

NVD description

The uglify-js package before 2.4.24 for Node.js does not properly account for non-boolean values when rewriting boolean expressions, which might allow attackers to bypass security mechanisms or possibly have unspecified other impact by leveraging improperly rewritten Javascript.

References

nvd.nist.gov/vuln/detail/CVE-2015-8857 · ADVISORY
mishoo/UglifyJS2 · WEB
lautis/uglifier commit 4677bfe · WEB
mishoo/UglifyJS2 · PACKAGE
rubysec/ruby-advisory-db · WEB
web.archive.org/web/20200227190830/http://www.securityfocus.com/bid/96410 · WEB
zyan.scripts.mit.edu/blog/backdooring-js · WEB
openwall.com/lists/oss-security/2016/04/20/11 · WEB
securityfocus.com/bid/96410 · Third Party Advisory
nodesecurity.io/advisories/39 · Exploit

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Package

Affected versions

Patched versions

uglifier

RubyGems

< 2.7.2

2.7.2

uglifyjs

uglifyjs_project

< 2.4.24

2.4.24

uglify-js

npm

< 2.4.24

2.4.24

Description

Versions of uglify-js prior to 2.4.24 are affected by a vulnerability which may cause crafted JavaScript to have altered functionality after minification.

Recommendation

Upgrade UglifyJS to version >= 2.4.24.

NVD description