[Japanese]

JVNDB-2017-000169

Installers of Lhaz and Lhaz+, and Self-Extracting Archives created by Lhaz or Lhaz+ may insecurely load Dynamic Link Libraries

Overview

Lhaz and Lhaz+ provided by Chitora soft contain the following vulnerabilities.
* Installers of Lhaz and Lhaz+ insecurely load Dynamic Link Libraries (CWE-427) - CVE-2017-2246, CVE-2017-2248
* Self-extracting archive files created by Lhaz or Lhaz+ insecurely load Dynamic Link Libraries (CWE-427) - CVE-2017-2247, CVE-2017-2249

Eili Masami of Tachibana Lab. reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

Base Metrics: 6.8 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: Partial

CVSS V3 Severity:
Base Metrics: 7.8 (High) [IPA Score]
  • Attack Vector: Local
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
The above CVSS base scores have been assigned for CVE-2017-2246, CVE-2017-2248.

Base Metrics: 6.8 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: Partial

CVSS V3 Severity:
Base Metrics: 7.8 (High) [IPA Score]
  • Attack Vector: Local
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
The above CVSS base scores have been assigned for CVE-2017-2247, CVE-2017-2249.
Affected Products


chitora
  • Lhaz version 2.4.0 and earlier (installer) - CVE-2017-2246
  • Lhaz version 2.4.0 and earlier (Self-extracting archive files created) - CVE-2017-2247
  • Lhaz+ version 3.4.0 and earlier (installer) - CVE-2017-2248
  • Lhaz+ version 3.4.0 and earlier (Self-extracting archive files created) - CVE-2017-2249

Impact

Arbitrary code may be executed with the privilege of the user invoking the installer. - CVE-2017-2246, CVE-2017-2248
Arbitrary code may be executed with the privilege of the user invoking the self-extracting archive file. - CVE-2017-2247, CVE-2017-2249
Solution

[Update the software]
Update to the latest version according to the information provided by the developer.
Vendor Information

chitora
CWE (What is CWE?)

  1. No Mapping(CWE-Other) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2017-2246
  2. CVE-2017-2247
  3. CVE-2017-2248
  4. CVE-2017-2249
References

  1. JVN : JVNTA#91240916
  2. JVN : JVN#21369452
Revision History

[2017/07/07]
  Web page was published
[2017/07/11]
  Affected Products : Product version was modified