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Fencer Vulns
medium 6.5

CVE-2020-35357 json

A buffer overflow can occur when calculating the quantile value using the Statistics Library of GSL (GNU Scientific Library), versions 2.5…

published 2023-08-22 3 y ago modified 2026-06-17 4 mo ago also EUVD-2020-23033

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

A buffer overflow can occur when calculating the quantile value using the Statistics Library of GSL (GNU Scientific Library), versions 2.5 and 2.6. Processing a maliciously crafted input data for gsl_stats_quantile_from_sorted_data of the library may lead to unexpected application termination or arbitrary code execution.

Patch / fix

  • gsl Debian 12 2.7.1+dfsg-5+deb12u1
  • gsl Debian 14, Debian 13 2.7.1+dfsg-6

debian advisories DEBIAN-CVE-2020-35357

  • gsl Ubuntu 20.04 LTS 2.5+dfsg-6+deb10u1build0.20.04.1
  • gsl Ubuntu Pro 16.04 LTS 2.1+dfsg-2ubuntu0.1~esm1
  • gsl Ubuntu Pro 18.04 LTS 2.4+dfsg-6ubuntu0.1~esm1
  • gsl Ubuntu Pro 22.04 LTS 2.7.1+dfsg-3ubuntu0.22.04.1~esm1

ubuntu advisories UBUNTU-CVE-2020-35357

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

  • gsl SLE Workstation Extension 12 SP5, SLE Software Development Kit 12 SP5 1.16-5.4.1
  • gsl SLE Module for Package Hub 15 SP5, SLE Module for Package Hub 15 SP4, SLE Module for Desktop Applications 15 SP5 +3 more 2.6-150200.3.4.3
  • gsl_2_6-gnu-hpc openSUSE Leap 15.5, openSUSE Leap 15.4 2.6-150200.3.4.3
  • gsl SLE Workstation Extension 15 SP5, SLE Workstation Extension 15 SP4, openSUSE Leap 15.4 2.4-150100.9.4.1
  • gsl_2_4-gnu-hpc openSUSE Leap 15.5, openSUSE Leap 15.4 2.4-150100.9.4.1

suse advisories SUSE-SU-2023:4051-1SUSE-SU-2023:3858-1SUSE-SU-2023:3527-1

  • gsl Azure Linux 3.0 2.8-1

azure linux advisories AZL-45111

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2020-35357 updated cvss 6.5

gsl: Stack buffer overflow in gsl_stats_quantile_from_sorted_data

  • Red Hat Enterprise Linux 6 gsl Red Hat Enterprise Linux 7 gsl
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 gsl Red Hat Enterprise Linux 9 gsl
    affected: no fix planned “Will not fix”

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
2 y ago

Exploit prediction

0.97% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

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.