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Fencer Intel
high 7.0

CVE-2020-1752 json

A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out.

published 6y ago modified 26d ago also EUVD-2020-12583

cvss
7.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 46%
public exploits
0
none known

Summary

A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out. Directory paths containing an initial tilde followed by a valid username were affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path that, when processed by the glob function, would potentially lead to arbitrary code execution. This was fixed in version 2.32.

Patch / fix

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • glibc Debian 14, Debian 13, Debian 12 2.30-3

debian advisories DEBIAN-CVE-2020-1752

  • glibc Ubuntu 16.04 LTS 2.23-0ubuntu11.2
  • glibc Ubuntu 18.04 LTS 2.27-3ubuntu1.2

ubuntu advisories UBUNTU-CVE-2020-1752

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

  • glibc RHEL 8 2.28-127.el8
  • nscd RHEL 8 2.28-127.el8
  • libnsl RHEL 8 2.28-127.el8
  • nss_db RHEL 8 2.28-127.el8
  • nss_hesiod RHEL 8 2.28-127.el8
  • glibc-utils RHEL 8 2.28-127.el8
  • glibc-common RHEL 8 2.28-127.el8
  • glibc-benchtests RHEL 8 2.28-127.el8

red hat advisories RHSA-2020:4444

  • glibc SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +4 more 2.22-123.1
  • glibc SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +3 more 2.22-100.21.5
  • glibc SLES for SAP 15, SLES 15-LTSS, SLE Module for Development Tools 15 SP1 +3 more 2.26-13.45.1

suse advisories SUSE-SU-2022:1123-1SUSE-SU-2020:0832-1SUSE-SU-2020:0820-1

  • glibc openSUSE Tumbleweed 2.34-1.2
  • glibc openSUSE Leap 15.1 2.26-lp151.19.11.1
  • glibc-testsuite-src openSUSE Leap 15.1 2.26-lp151.19.11.1

opensuse advisories openSUSE-SU-2024:10792-1openSUSE-SU-2020:0467-1

Is CVE-2020-1752 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2020-1752 updated cvss 7.0

glibc: use-after-free in glob() function when expanding ~user

  • Red Hat Enterprise Linux 7 nscd, glibc, glibc-utils, glibc-common
    affected: workaround, no fix planned “Avoid the expansion of overly long directory paths.”
  • Red Hat CodeReady Linux Builder (v. 8) nss_hesiod 2.28-127.el8, glibc-benchtests 2.28-127.el8, glibc-debuginfo-common 2.28-127.el8 Red Hat Enterprise Linux AppStream (v. 8) glibc-utils 2.28-127.el8, glibc-debuginfo-common 2.28-127.el8, compat-libpthread-nonshared 2.28-127.el8 Red Hat Enterprise Linux BaseOS (v. 8) nscd 2.28-127.el8, glibc 2.28-127.el8, libnsl 2.28-127.el8, nss_db 2.28-127.el8, glibc-common 2.28-127.el8, glibc-all-langpacks 2.28-127.el8, +3 more
    fixed: vendor fix “Avoid the expansion of overly long directory paths.” RHSA-2020:4444
  • Red Hat Enterprise Linux 5 glibc Red Hat Enterprise Linux 6 nscd, glibc, glibc-utils, glibc-common
    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 ICSA-23-348-10 updated cvss 7.0

Siemens SIMATIC S7-1500

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.0, < 3.1.5
    affected: fixed in V3.1.5, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-23-166-10 updated cvss 7.0

Siemens SIMATIC S7-1500 TM MFP BIOS

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 3.7 AV:L/AC:H/Au:N/C:P/I:P/A:P

Affected products

  • GNU Libc glibc
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness

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.