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Fencer Intel
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 5y ago modified 4mo 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

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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-2020-27746 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, 2026-11-09).

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 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.