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Fencer Vulns
low 3.7

CVE-2020-27746 json

Slurm before 19.05.8 and 20.x before 20.02.6 exposes Sensitive Information to an Unauthorized Actor because xauth for X11 magic cookies is…

published 2020-11-27 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-20250

cvss
3.7
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

Slurm before 19.05.8 and 20.x before 20.02.6 exposes Sensitive Information to an Unauthorized Actor because xauth for X11 magic cookies is affected by a race condition in a read operation on the /proc filesystem.

Patch / fix

  • schedmd slurm 19.05.8, 20.02.6
  • slurm-llnl Ubuntu Pro 18.04 LTS 17.11.2-1ubuntu0.1~esm4
  • slurm-llnl Ubuntu Pro 20.04 LTS 19.05.5-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2020-27746

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • pdsh SLE Module for HPC 12 2.34-7.32.1
  • slurm_20_11 SLE Module for HPC 12 20.11.4-3.5.1
  • pdsh_slurm_18_08 SLE Module for HPC 12 2.34-7.32.1
  • pdsh_slurm_20_02 SLE Module for HPC 12 2.34-7.32.1
  • pdsh_slurm_20_11 SLE Module for HPC 12 2.34-7.32.1
  • slurm_20_02 SLE Module for HPC 15 SP1 20.02.6-3.16.1
  • slurm_20_02 SLE Module for HPC 12 20.02.6-3.8.1
  • slurm SLE Module for HPC 15 SP1, SLE High Performance Computing 15-LTSS, SLE High Performance Computing 15-ESPOS 17.11.13-6.34.1

suse advisories SUSE-SU-2021:0773-1SUSE-SU-2021:0139-1SUSE-SU-2020:3892-1SUSE-SU-2020:3878-1SUSE-SU-2020:3877-1SUSE-SU-2020:3863-1

  • slurm openSUSE Tumbleweed 21.08.1-1.1
  • slurm openSUSE Leap 15.2 18.08.9-lp152.5.1
  • slurm openSUSE Leap 15.1 18.08.9-lp151.6.1
  • slurm openSUSE Leap 15.2 20.02.6-lp152.2.3.1
  • slurm openSUSE Leap 15.1 18.08.9-lp151.2.14.1

opensuse advisories openSUSE-SU-2024:11389-1openSUSE-SU-2021:0096-1openSUSE-SU-2020:2286-1openSUSE-SU-2020:2056-1openSUSE-SU-2020:2033-1

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-2020-27746 updated cvss 8.8

slurm: potential leak of the magic cookie when sent as an argument to the xauth command

  • 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

Exploit prediction

0.83% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

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.