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CISA KEV · Known exploitedHigh

CVE-2020-36193

PEAR Archive_Tar

Tar.php in Archive_Tar through 1.4.11 allows write operations with Directory Traversal due to inadequate checking of symbolic links, a related issue to CVE-2020-28948.

CVSS
7.5
EPSS
70.6%
99.3% percentile
CISA KEV
Listed
Published
2021.01.19
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability70.6%
Technical severityCVSS 7.5

Vulnerability overview

Tar.php in Archive_Tar through 1.4.11 allows write operations with Directory Traversal due to inadequate checking of symbolic links, a related issue to CVE-2020-28948.

Affected product and versions

Product
PEAR Archive_Tar
Affected versions
<= 1.4.11, 32, 33, 34, 35, 9.0, 10.0, >= 7.0 < 7.78, >= 8.9.0 < 8.9.13, >= 9.0.0 < 9.0.11, >= 9.1.0 < 9.1.3
Fixed versions
7.78, 8.9.13, 9.0.11, 9.1.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2022.09.15
  1. 1
    Identify

    Confirm that PEAR Archive_Tar and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
CWE-22, CWE-59
KEV added
2022.08.25
Ransomware use
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