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CVE-2020-28949

95
FAUCET Score

CVE-2020-28949 is a critical vulnerability in Archive_Tar versions up to 1.4.10, affecting products like Debian, Drupal, and PHP. It allows attackers to overwrite arbitrary files by exploiting stream-wrapper attacks, bypassing existing sanitization for phar attacks. With a CVSS score of 7.8 (High), this vulnerability requires user interaction but can lead to complete compromise of confidentiality, integrity, and availability. The vulnerability is actively exploited, listed in CISA's KEV catalog, and has publicly available exploit modules, including a Metasploit module, indicating widespread community attention and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.4.12CPE matchmatch criteria
cpe:2.3:a:php:archive_tar:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
32CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
33CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
84.55%
Probability of exploitation in next 30 days
EPSS Percentile
99.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Added to KEV · Aug 25, 2022
Metasploit: PEAR Archive_Tar 1.4.10 Arbitrary File Write · Nov 17, 2020
This CVE's current EPSS score of 0.8455 is in the 100th percentile among its peer group of 11,616 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

composerpatch availablevia ghsa
Product: pear/archive_tarFixed in: 1.4.11
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: php:7.4-8040020220907095003.d7c09045
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: php-pear-1:1.9.4-23.el7_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: php:7.4-8060020220907094815.5caa48ff
View patch
github_advisoryvendor investigatingvia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: php:7.2/php-pear
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: php:7.3/php-pear
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-php73-php-pear

Vendor Advisories (2)

composerGHSA-75c5-f4gw-38r9high

Multiple vulnerabilities through filename manipulation in Archive_Tar

Apr 22, 2021
redhatCVE-2020-28949Moderate

Archive_Tar: improper filename sanitization leads to file overwrites

Nov 19, 2020

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
packetstormsecurity.com / files/161095/PEAR-Archive_Tar-Arbitrary-File-Write.html
ExploitThird Party AdvisoryVDB Entry
github.com / pear/Archive_Tar/issues/33
ExploitIssue TrackingVendor Advisory
lists.debian.org / debian-lts-announce/2020/11/msg00045.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/42GPGVVFTLJYAKRI75IVB5R45NYQGEUR
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/4V35LBRM6HBCXBVCITKQ4UEBTXO2EG7B
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/5KSFM672XW3X6BR7TVKRD63SLZGKK437
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/KWM4CTMEGAC4I2CHYNJVSROY4CVXVEUT
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/NBYZSHYTIOBK6V7C4N7TP6KIKCRKLVWP
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/VJQQYDAOWHD6RDITDRPHFW7WY6BS3V5N
Mailing ListThird Party Advisory
security.gentoo.org / glsa/202101-23
Third Party Advisory
debian.org / security/2020/dsa-4817
Mailing ListThird Party Advisory
drupal.org / sa-core-2020-013
Third Party Advisory