Unserialization Threat in Archive_Tar by PEAR
CVE-2020-28948

7.8HIGH

Key Information:

Vendor

PHP
Status
Archive Tar
Vendor
CVE Published:
19 November 2020

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 76%

What is CVE-2020-28948?

The Archive_Tar component through version 1.4.10 is susceptible to an unserialization attack. While the 'phar:' stream is blocked, the 'PHAR:' stream remains unblocked, leading to potential exploitation. This behavior makes applications using Archive_Tar vulnerable to unauthorized data manipulation and execution, emphasizing the need for vigilance in application design and security practices.

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Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2020-28948-and-CVE-2020-28949
Created by 0x240x23elu

cve-2020-28948
Created by nopdata

PoC-for-CVE-2020-28948-CVE-2020-28949
Created by JinHao-L

References

https://github.com/pear/Archive_Tar/issues/33
x_refsource_MISC
https://www.drupal.org/sa-core-2020-013
x_refsource_CONFIRM
https://lists.debian.org/debian-lts-announce/2020/11/msg0...
mailing-listx_refsource_MLIST

EPSS Score

76% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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