PHP Object Injection Vulnerability in PEAR Archive_Tar by PEAR
CVE-2018-1000888

8.8HIGH

Key Information:

Vendor

PHP
Status
Pear Archive Tar
Vendor
CVE Published:
28 December 2018

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 29%

What is CVE-2018-1000888?

The Archive_Tar class in PEAR's Archive_Tar prior to version 1.4.4 is susceptible to object injection through crafted tar files. This vulnerability allows attackers to manipulate file operations using the $v_header['filename'] parameter, which can lead to arbitrary file deletions via calls to @unlink($this->_temp_tarname). If other vulnerable PHP classes are instantiated, it increases the risk of remote code execution, potentially allowing unauthorized access or manipulation of the system.

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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-2018-1000888 - Proof of Concept

CVE-2018-1000888 - Proof of Concept

References

https://lists.debian.org/debian-lts-announce/2019/02/msg0...
mailing-listx_refsource_MLIST
https://usn.ubuntu.com/3857-1/
vendor-advisoryx_refsource_UBUNTU
https://www.debian.org/security/2019/dsa-4378
vendor-advisoryx_refsource_DEBIAN

EPSS Score

29% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
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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