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Fencer Vulns
medium 5.2

CVE-2022-23538 json

User credentials leaked to third-party service via HTTP redirect in scs-library-client

published 2023-01-17 3 y ago modified 2026-06-17 4 mo ago also GHSA-7p8m-22h4-9pj7 , GO-2023-1497 , EUVD-2023-0392

cvss
5.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits
0
none known

Summary

github.com/sylabs/scs-library-client is the Go client for the Singularity Container Services (SCS) Container Library Service. When the scs-library-client is used to pull a container image, with authentication, the HTTP Authorization header sent by the client to the library service may be incorrectly leaked to an S3 backing storage provider. This occurs in a specific flow, where the library service redirects the client to a backing S3 storage server, to perform a multi-part concurrent download. Depending on site configuration, the S3 service may be provided by a third party. An attacker with access to the S3 service may be able to extract user credentials, allowing them to impersonate the user. The vulnerable multi-part concurrent download flow, with redirect to S3, is only used when communicating with a Singularity Enterprise 1.x installation, or third party server implementing this flow. Interaction with Singularity Enterprise 2.x, and Singularity Container Services (cloud.sylabs.io), does not trigger the vulnerable flow. We encourage all users to update. Users who interact with a Singularity Enterprise 1.x installation, using a 3rd party S3 storage service, are advised to revoke and recreate their authentication tokens within Singularity Enterprise. There is no workaround available at this time.

Patch / fix

  • go github.com/sylabs/scs-library-client 1.3.4, 1.4.2
  • singularity-ce openSUSE Tumbleweed 4.1.3-1.1
  • apptainer openSUSE Tumbleweed 1.1.6-1.1

opensuse advisories openSUSE-SU-2024:14059-1openSUSE-SU-2024:12694-1

  • apptainer Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 1.1.6-r0

alpine advisories ALPINE-CVE-2022-23538

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2022-23538 updated cvss 5.2

scs-library-client: User credentials leaked to third-party service via HTTP redirect

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
19 mo ago

Exploit prediction

0.74% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:N
NVD 3.1 7.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
GitHub 3.1 5.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:N

Affected packages

ecosystem package affected fixed in
go github.com/sylabs/scs-library-client
>=1.4.0, <1.4.2
<1.3.4
1.4.2
1.3.4

Affected products

  • sylabs scs-library-client

Classification

Weakness
  • CWE-522 Insufficiently Protected Credentials
  • CWE-601 URL Redirection to Untrusted Site

References

Sources

Fencer Vulns 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.