Archive_Tar through 1.4.10 allows an unserialization attack because phar: is blocked but PHAR: is not blocked.
- Published
- Nov 19, 2020
- Updated
- Jun 16, 2026
- EPSS
- 47.5% · 99th percentile
- CWE
- CWE-502
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Report tools
Action score
45
Plan
Add it to your regular patch cycle.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 14 / 30 · 47.5%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| php | archive tar | cpe:2.3:a:php:archive_tar |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| drupal | drupal | cpe:2.3:a:drupal:drupal |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux10.0
- debian debian linux9.0
- drupal drupal8.0.0 and later · before 8.9.10
- drupal drupal8.8.0 and later · before 8.8.12
- drupal drupal7.0 and later · before 7.75
- drupal drupal9.0.0 and later · before 9.0.9
- fedoraproject fedora32
- fedoraproject fedora33
- fedoraproject fedora34
- fedoraproject fedora35
- php archive tarbefore 1.4.11
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | apcu-panel | before 5.1.18-1.module_el8.6.0+2750+78feabcb | 5.1.18-1.module_el8.6.0+2750+78feabcb |
| AlmaLinux:8 | libzip | before 1.6.1-1.module_el8.6.0+2750+78feabcb | 1.6.1-1.module_el8.6.0+2750+78feabcb |
| AlmaLinux:8 | libzip | before 1.6.1-1.module_el8.6.0+3239+bedf0508 | 1.6.1-1.module_el8.6.0+3239+bedf0508 |
| AlmaLinux:8 | libzip-devel | before 1.6.1-1.module_el8.6.0+2750+78feabcb | 1.6.1-1.module_el8.6.0+2750+78feabcb |
| AlmaLinux:8 | libzip-devel | before 1.6.1-1.module_el8.6.0+3239+bedf0508 | 1.6.1-1.module_el8.6.0+3239+bedf0508 |
| AlmaLinux:8 | libzip-tools | before 1.6.1-1.module_el8.6.0+2750+78feabcb | 1.6.1-1.module_el8.6.0+2750+78feabcb |
| AlmaLinux:8 | libzip-tools | before 1.6.1-1.module_el8.6.0+3239+bedf0508 | 1.6.1-1.module_el8.6.0+3239+bedf0508 |
| AlmaLinux:8 | php | before 7.4.19-4.module_el8.6.0+3238+624bf8b8 | 7.4.19-4.module_el8.6.0+3238+624bf8b8 |
| AlmaLinux:8 | php | before 7.4.19-4.module_el8.6.0+3239+bedf0508 | 7.4.19-4.module_el8.6.0+3239+bedf0508 |
| AlmaLinux:8 | php-bcmath | before 7.4.19-4.module_el8.6.0+3238+624bf8b8 | 7.4.19-4.module_el8.6.0+3238+624bf8b8 |
| AlmaLinux:8 | php-bcmath | before 7.4.19-4.module_el8.6.0+3239+bedf0508 | 7.4.19-4.module_el8.6.0+3239+bedf0508 |
| AlmaLinux:8 | php-cli | before 7.4.19-4.module_el8.6.0+3239+bedf0508 | 7.4.19-4.module_el8.6.0+3239+bedf0508 |
| AlmaLinux:8 | php-cli | before 7.4.19-4.module_el8.6.0+3238+624bf8b8 | 7.4.19-4.module_el8.6.0+3238+624bf8b8 |
| AlmaLinux:8 | php-common | before 7.4.19-4.module_el8.6.0+3239+bedf0508 | 7.4.19-4.module_el8.6.0+3239+bedf0508 |
| AlmaLinux:8 | php-common | before 7.4.19-4.module_el8.6.0+3238+624bf8b8 | 7.4.19-4.module_el8.6.0+3238+624bf8b8 |
| AlmaLinux:8 | php-dba | before 7.4.19-4.module_el8.6.0+3238+624bf8b8 | 7.4.19-4.module_el8.6.0+3238+624bf8b8 |
| AlmaLinux:8 | php-dba | before 7.4.19-4.module_el8.6.0+3239+bedf0508 | 7.4.19-4.module_el8.6.0+3239+bedf0508 |
| AlmaLinux:8 | php-dbg | before 7.4.19-4.module_el8.6.0+3238+624bf8b8 | 7.4.19-4.module_el8.6.0+3238+624bf8b8 |
| AlmaLinux:8 | php-dbg | before 7.4.19-4.module_el8.6.0+3239+bedf0508 | 7.4.19-4.module_el8.6.0+3239+bedf0508 |
| AlmaLinux:8 | php-devel | before 7.4.19-4.module_el8.6.0+3238+624bf8b8 | 7.4.19-4.module_el8.6.0+3238+624bf8b8 |
| AlmaLinux:8 | php-devel | before 7.4.19-4.module_el8.6.0+3239+bedf0508 | 7.4.19-4.module_el8.6.0+3239+bedf0508 |
| AlmaLinux:8 | php-embedded | before 7.4.19-4.module_el8.6.0+3239+bedf0508 | 7.4.19-4.module_el8.6.0+3239+bedf0508 |
| AlmaLinux:8 | php-embedded | before 7.4.19-4.module_el8.6.0+3238+624bf8b8 | 7.4.19-4.module_el8.6.0+3238+624bf8b8 |
| AlmaLinux:8 | php-enchant | before 7.4.19-4.module_el8.6.0+3239+bedf0508 | 7.4.19-4.module_el8.6.0+3239+bedf0508 |
+96
Same product
php: all recordsOther highest-scoring records for the same primary product.
- CVE-2020-28949Archive_Tar through 1.4.10 has :// filename sanitization only to address phar attacks, and thus any other stream-wrapper attack (such as filKEV86Now
- CVE-2020-36193Tar.php in Archive_Tar through 1.4.11 allows write operations with Directory Traversal due to inadequate checking of symbolic links, a relatKEV81Now
- CVE-2021-32610In Archive_Tar before 1.4.14, symlinks can refer to targets outside of the extracted archive, a different vulnerability than CVE-2020-36193.50Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:apcu-panel | 5.1.18-1.module_el8.6.0+2750+78feabcb · AlmaLinux:8 | Package registry (OSV) |
| almalinux:libzip | 1.6.1-1.module_el8.6.0+2750+78feabcb · AlmaLinux:8 | Package registry (OSV) |
| almalinux:libzip-devel | 1.6.1-1.module_el8.6.0+2750+78feabcb · AlmaLinux:8 | Package registry (OSV) |
| almalinux:libzip-tools | 1.6.1-1.module_el8.6.0+3239+bedf0508 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:php | 7.4.19-4.module_el8.6.0+3238+624bf8b8 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:php-bcmath | 7.4.19-4.module_el8.6.0+3238+624bf8b8 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:php-cli | 7.4.19-4.module_el8.6.0+3239+bedf0508 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:php-common | 7.4.19-4.module_el8.6.0+3239+bedf0508 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:php-dba | 7.4.19-4.module_el8.6.0+3238+624bf8b8 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:php-dbg | 7.4.19-4.module_el8.6.0+3238+624bf8b8 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:php-devel | 7.4.19-4.module_el8.6.0+3238+624bf8b8 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:php-embedded | 7.4.19-4.module_el8.6.0+3239+bedf0508 · AlmaLinux:8 | Package registry (OSV) |
| debian:drupal7 | 7.52-2+deb9u13 · Debian:9 | Package registry (OSV) |
| debian:php-pear | 1:1.10.9+submodules+notgz-1.1 · Debian:12 | Package registry (OSV) |
| Packagist:drupal/core | 8.8.12 | Package registry (OSV) |
| Packagist:drupal/core | 8.9.10 | Package registry (OSV) |
| Packagist:drupal/core | 9.0.9 | Package registry (OSV) |
| Packagist:pear/archive_tar | 1.4.11 | Package registry (OSV) |
| red hat:apcu-panel | 0:5.1.18-1.module+el8.3.0+6678+b09f589e · Red Hat:rhel_eus:8.4::appstream | Package registry (OSV) |
| red hat:libzip | 0:1.6.1-1.module+el8.3.0+6678+b09f589e · Red Hat:rhel_eus:8.4::appstream | Package registry (OSV) |
| red hat:libzip-debuginfo | 0:1.6.1-1.module+el8.3.0+6678+b09f589e · Red Hat:rhel_eus:8.4::appstream | Package registry (OSV) |
| red hat:libzip-debugsource | 0:1.6.1-1.module+el8.3.0+6678+b09f589e · Red Hat:rhel_eus:8.4::appstream | Package registry (OSV) |
| red hat:libzip-devel | 0:1.6.1-1.module+el8.3.0+6678+b09f589e · Red Hat:rhel_eus:8.4::appstream | Package registry (OSV) |
| red hat:libzip-tools | 0:1.6.1-1.module+el8.3.0+6678+b09f589e · Red Hat:rhel_eus:8.4::appstream | Package registry (OSV) |
| red hat:libzip-tools-debuginfo | 0:1.6.1-1.module+el8.3.0+6678+b09f589e · Red Hat:rhel_eus:8.4::appstream | Package registry (OSV) |
| red hat:php | 0:7.4.6-5.module+el8.4.0+15727+276bb227 · Red Hat:rhel_eus:8.4::appstream | Package registry (OSV) |
| red hat:php-bcmath | 0:7.4.6-5.module+el8.4.0+15727+276bb227 · Red Hat:rhel_eus:8.4::appstream | Package registry (OSV) |
| red hat:php-bcmath-debuginfo | 0:7.4.6-5.module+el8.4.0+15727+276bb227 · Red Hat:rhel_eus:8.4::appstream | Package registry (OSV) |
| red hat:php-cli | 0:7.4.6-5.module+el8.4.0+15727+276bb227 · Red Hat:rhel_eus:8.4::appstream | Package registry (OSV) |
| red hat:php-cli-debuginfo | 0:7.4.6-5.module+el8.4.0+15727+276bb227 · Red Hat:rhel_eus:8.4::appstream | Package registry (OSV) |
+7
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 ×3
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.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:6 | 2020-11-27 |
| Proof-of-concept repository on GitHub | stars:0 | 2021-05-24 |
| Proof-of-concept repository on GitHub | stars:0 | 2022-10-03 |
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.
- Published
- First PoC+7 d
- TodayOct 8, 2026+2149 d
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 researchersFinders, 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.
- TR-20-994 · Nov 26, 2020(Drupal Güvenlik Güncellemesi Yayınladı)
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-502 · Deserialization of Untrusted DataCVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvd-primary
Root cause
Data received over the network is deserialized into the language’s native object format without verifying its source. Code paths inside the object can be triggered during deserialization.
The bug in code
The whole CWE-502 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
payload = sock.recv(65536)job = pickle.loads(payload)Fixed
payload = sock.recv(65536)if not hmac.compare_digest(sign(payload), header_sig): raise PermissionError("invalid signature")job = JobSchema.validate(json.loads(payload))Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- lists.debian.org/debian-lts-announce/2020/11/msg00045.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/42GPGVVFTLJYAKRI75IVB5R45NYQGEUR/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4V35LBRM6HBCXBVCITKQ4UEBTXO2EG7B/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5KSFM672XW3X6BR7TVKRD63SLZGKK437/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KWM4CTMEGAC4I2CHYNJVSROY4CVXVEUT/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NBYZSHYTIOBK6V7C4N7TP6KIKCRKLVWP/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VJQQYDAOWHD6RDITDRPHFW7WY6BS3V5N/
- security.gentoo.org/glsa/202101-23
- www.debian.org/security/2020/dsa-4817
- www.drupal.org/sa-core-2020-013
Vendor advisories and official records. Exploit/PoC links are deliberately left out.