Skip to content
Fencer Vulns
medium 6.5

CVE-2020-14059 json

An issue was discovered in Squid 5.x before 5.0.3.

published 2020-06-30 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-6221

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.4%
EPSS 4.4% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

An issue was discovered in Squid 5.x before 5.0.3. Due to an Incorrect Synchronization, a Denial of Service can occur when processing objects in an SMP cache because of an Ipc::Mem::PageStack::pop ABA problem during access to the memory page/slot management list.

Patch / fix

  • squid-cache squid 5.0.3
  • squid3 SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 3.1.23-8.16.37.12.1
  • squid SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES for SAP 12 SP2 +10 more 3.5.21-26.26.1
  • squid SLES for SAP 12 SP5, SLES 12 SP5 4.12-4.12.1
  • squid SLES for SAP 15, SLES 15-LTSS, SLE Module for Server Applications 15 SP2 +3 more 4.12-5.20.1

suse advisories SUSE-SU-2020:14460-1SUSE-SU-2020:1803-1SUSE-SU-2020:1770-1SUSE-SU-2020:1769-1

  • squid openSUSE Tumbleweed 4.16-1.5
  • squid openSUSE Leap 15.2 4.12-lp152.2.3.1
  • squid openSUSE Leap 15.1 4.12-lp151.2.21.1

opensuse advisories openSUSE-SU-2024:11403-1openSUSE-SU-2020:0914-1openSUSE-SU-2020:0910-1

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-2020-14059 updated cvss 6.3

squid: DoS when processing objects in an SMP cache due to an incorrect synchronization

  • Red Hat Enterprise Linux 5 squid Red Hat Enterprise Linux 6 squid, squid34 Red Hat Enterprise Linux 7 squid, squid-sysvinit, squid-migration-script Red Hat Enterprise Linux 8 squid, libecap
    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

4.41% chance of exploitation in the next 30 days, higher than 91% 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:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:N/A:P

Classification

Weakness

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.