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NVD / CVE Program· CNA redhat

CVE-2021-3572: A flaw was found in python-pip in the way it handled Unicode separators in git references.

Noroxi assessment

Priority: Monitor (action score 23/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.8% (FIRST EPSS); higher than 78.7% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: python3-pip (AlmaLinux:8) 9.0.3-20.el8; python38-asn1crypto (AlmaLinux:8) 1.2.0-3.module_el8.6.0+2778+cd494b30; python38-atomicwrites (AlmaLinux:8) 1.3.0-8.module_el8.6.0+2778+cd494b30.
  • Mentioned 3 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to python3-pip (AlmaLinux:8) 9.0.3-20.el8; python38-asn1crypto (AlmaLinux:8) 1.2.0-3.module_el8.6.0+2778+cd494b30; python38-atomicwrites (AlmaLinux:8) 1.3.0-8.module_el8.6.0+2778+cd494b30 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A flaw was found in python-pip in the way it handled Unicode separators in git references. A remote attacker could possibly use this issue to install a different revision on a repository. The highest threat from this vulnerability is to data integrity. This is fixed in python-pip version 21.1.

MediumCVSS 5.7 · v3.1—Proof of concept Fix available
Published
Nov 10, 2021
Updated
Oct 8, 2026
EPSS
1.8% · 78th percentile

Report tools

JSON

Action score

23

Monitor

Low priority for now.

CVSS
22 / 40 · 5.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 1.8%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-3572

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
pypapip
oracleagile product lifecycle management
oraclecommunications cloud native core network function cloud native environment
oraclecommunications cloud native core policy

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • oracle agile product lifecycle management9.3.6
  • oracle communications cloud native core network function cloud native environment1.10.0
  • oracle communications cloud native core network function cloud native environment22.1.0
  • oracle communications cloud native core policy1.15.0
  • oracle communications cloud native core policy22.1.3
  • pypa pipbefore 21.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a python-pip

    • fixed in python-pip 21.1affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8python3-pipbefore 9.0.3-20.el89.0.3-20.el8
AlmaLinux:8python38-asn1cryptobefore 1.2.0-3.module_el8.6.0+2778+cd494b301.2.0-3.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-atomicwritesbefore 1.3.0-8.module_el8.6.0+2778+cd494b301.3.0-8.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-attrsbefore 19.3.0-3.module_el8.6.0+2778+cd494b3019.3.0-3.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-babelbefore 2.7.0-11.module_el8.6.0+2778+cd494b302.7.0-11.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-cffibefore 1.13.2-3.module_el8.6.0+2778+cd494b301.13.2-3.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-chardetbefore 3.0.4-19.module_el8.6.0+2778+cd494b303.0.4-19.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-cryptographybefore 2.8-3.module_el8.6.0+2778+cd494b302.8-3.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-Cythonbefore 0.29.14-4.module_el8.6.0+2778+cd494b300.29.14-4.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-idnabefore 2.8-6.module_el8.6.0+2778+cd494b302.8-6.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-jinja2before 2.10.3-5.module_el8.6.0+2778+cd494b302.10.3-5.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-markupsafebefore 1.1.1-6.module_el8.6.0+2778+cd494b301.1.1-6.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-mod_wsgibefore 4.6.8-3.module_el8.6.0+2778+cd494b304.6.8-3.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-more-itertoolsbefore 7.2.0-5.module_el8.6.0+2778+cd494b307.2.0-5.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-numpybefore 1.17.3-6.module_el8.6.0+2778+cd494b301.17.3-6.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-numpy-docbefore 1.17.3-6.module_el8.6.0+2778+cd494b301.17.3-6.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-numpy-f2pybefore 1.17.3-6.module_el8.6.0+2778+cd494b301.17.3-6.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-packagingbefore 19.2-3.module_el8.6.0+2778+cd494b3019.2-3.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-pluggybefore 0.13.0-3.module_el8.6.0+2778+cd494b300.13.0-3.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-plybefore 3.11-10.module_el8.6.0+2778+cd494b303.11-10.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-psutilbefore 5.6.4-4.module_el8.6.0+2778+cd494b305.6.4-4.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-psycopg2before 2.8.4-4.module_el8.6.0+2778+cd494b302.8.4-4.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-psycopg2-docbefore 2.8.4-4.module_el8.6.0+2778+cd494b302.8.4-4.module_el8.6.0+2778+cd494b30
AlmaLinux:8python38-psycopg2-testsbefore 2.8.4-4.module_el8.6.0+2778+cd494b302.8.4-4.module_el8.6.0+2778+cd494b30

+96

Same product

pypa: all records

Other highest-scoring records for the same primary product.

  • CVE-2018-20225An issue was discovered in pip (all versions) because it installs the version with the highest version number, even if the user had intended
    32Monitor
  • CVE-2019-20916The pip package before 19.2 for Python allows Directory Traversal when a URL is given in an install command, because a Content-Disposition h
    31Monitor
  • CVE-2013-1629pip before 1.3 uses HTTP to retrieve packages from the PyPI repository, and does not perform integrity checks on package contents, which all
    29Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2014-8991Nov 24, 2014 · pip 1.3 through 1.5.6 allows local users to cause a denial of service (prevention of package installation) by creating a /tmp/pip-build-* fi
    8Monitor
  • ← EarlierCVE-2013-5123Nov 5, 2019 · The mirroring support (-M, --use-mirrors) in Python Pip before 1.5 uses insecure DNS querying and authenticity checks which allows attackers
    25Monitor
  • Later →CVE-2023-5752Oct 25, 2023 · Mercurial configuration injectable in repo revision when installing via pip
    13Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:python39-attrs20.3.0-2.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
almalinux:python39-cffi1.14.3-2.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
almalinux:python39-chardet3.0.4-19.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
almalinux:python39-cryptography3.3.1-2.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
almalinux:python39-Cython0.29.21-5.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
almalinux:python39-idna2.10-3.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
almalinux:python39-iniconfig1.1.1-2.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
almalinux:python39-mod_wsgi4.7.1-4.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
almalinux:python39-more-itertools8.5.0-2.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
almalinux:python39-numpy1.19.4-3.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
almalinux:python39-numpy-doc1.19.4-3.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
almalinux:python39-PyMySQL0.10.1-2.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
debian:python-pip20.3.4-2 · Debian:12Package registry (OSV)
opensuse:python2.7.18-150000.38.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:python-base2.7.18-150000.38.2 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:python-doc2.7.18-150000.38.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:python-pip10.0.1-lp152.4.9.1 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:python-pip-wheel10.0.1-lp152.4.9.1 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:python33.6.15-150300.10.21.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:python3-core3.6.15-150300.10.21.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:python3-documentation3.6.15-150300.10.21.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:python393.9.10-150300.4.8.2 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:python39-core3.9.10-150300.4.8.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:python39-documentation3.9.10-150300.4.8.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:python39-pip20.2.4-7.8.1 · openSUSE:Leap 15.3Package registry (OSV)
PyPI:pip21.1Package registry (OSV)
red hat:rh-python38-babel0:2.7.0-12.el7 · Red Hat:rhel_software_collections:3::el7Package registry (OSV)
red hat:rh-python38-python0:3.8.11-2.el7 · Red Hat:rhel_software_collections:3::el7Package registry (OSV)
red hat:rh-python38-python-babel0:2.7.0-12.el7 · Red Hat:rhel_software_collections:3::el7Package registry (OSV)
red hat:rh-python38-python-cryptography0:2.8-5.el7 · Red Hat:rhel_software_collections:3::el7Package registry (OSV)

+33

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:22021-06-07

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. First PoC-157 d
  2. Published
  3. TodayOct 26, 2026+1811 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records