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Fencer Intel
high 7.5

CVE-2020-29529 json

Unsafe tar unpacking in HashiCorp go-slug

published 5y ago modified 4mo ago also GHSA-2g5j-5x95-r6hr , GO-2021-0094 , EUVD-2023-0600

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.8%
EPSS 2.8% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

HashiCorp go-slug up to 0.4.3 did not fully protect against directory traversal while unpacking tar archives, and protections could be bypassed with specific constructions of multiple symlinks. Fixed in 0.5.0.

Patch / fix

  • go github.com/hashicorp/go-slug 0.5.0
  • hashicorp go-slug 0.5.0
  • golang-github-hashicorp-go-slug Debian 12 0.5.0-1

debian advisories DEBIAN-CVE-2020-29529

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-29529 updated cvss 7.5

go-slug: partial protection against zip slip attacks

  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/openshift-hive-rhel8, rhacm2/multicloud-manager-rhel8
    affected: no fix available

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.82% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • securitylab.github.com https://securitylab.github.com/advisories/GHSL-2020-262-zipslip-go-slug referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
go github.com/hashicorp/go-slug
<0.5.0
0.5.0

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory
  • CWE-59 Improper Link Resolution Before File Access

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.