CVE-2015-8371
Composer allows cache poisoning from other projects built on the same host
8.8
HIGH
CVSS 3.1
EPSS 0.74%
Description
Composer before 2016-02-10 allows cache poisoning from other projects built on the same host. This results in attacker-controlled code entering a server-side build process. The issue occurs because of the way that dist packages are cached. The cache key is derived from the package name, the dist type, and certain other data from the package repository (which may simply be a commit hash, and thus can be found by an attacker). Versions through 1.0.0-alpha11 are affected, and 1.0.0 is unaffected.
How to fix CVE-2015-8371
To remediate CVE-2015-8371, upgrade the affected package to a fixed version below.
- —upgrade to 1.0.0~alpha11-3 or later
- —upgrade to 1.0.0 or later
Is CVE-2015-8371 being exploited?
Low — EPSS is 0.7%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.0.0~alpha11-3
- from 0, < 1.0.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |