Headline
CVE-2023-27527: Improper restriction of XML external entity references (XXE) in Shinseiyo Sogo Soft
Shinseiyo Sogo Soft (7.9A) and earlier improperly restricts XML external entity references (XXE). By processing a specially crafted XML file, arbitrary files on the PC may be accessed by an attacker.
Published:2023/04/19 Last Updated:2023/04/19
Overview
Shinseiyo Sogo Soft provided by The Ministry of Justice improperly restricts XML external entity references (XXE).
Products Affected
- Shinseiyo Sogo Soft (7.9A) and earlier
Description
Shinseiyo Sogo Soft provided by The Ministry of Justice improperly restricts XML external entity references (XXE) (CWE-611).
Impact
By processing a specially crafted XML file, arbitrary files on the PC may be accessed by an attacker.
Solution
Update the Software
Update the software to the latest version according to the information provided by the developer
Vendor Status
References
JPCERT/CC Addendum
Vulnerability Analysis by JPCERT/CC
CVSS v3 CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Attack Vector(AV)
Physical §
Local (L)
Adjacent (A)
Network (N)
Attack Complexity(AC)
High (H)
Low (L)
Privileges Required(PR)
High (H)
Low (L)
None (N)
User Interaction(UI)
Required ®
None (N)
Scope(S)
Unchanged (U)
Changed ©
Confidentiality Impact©
None (N)
Low (L)
High (H)
Integrity Impact(I)
None (N)
Low (L)
High (H)
Availability Impact(A)
None (N)
Low (L)
High (H)
CVSS v2 AV:L/AC:H/Au:N/C:P/I:N/A:N
Access Vector(AV)
Local (L)
Adjacent Network (A)
Network (N)
Access Complexity(AC)
High (H)
Medium (M)
Low (L)
Authentication(Au)
Multiple (M)
Single (S)
None (N)
Confidentiality Impact©
None (N)
Partial §
Complete ©
Integrity Impact(I)
None (N)
Partial §
Complete ©
Availability Impact(A)
None (N)
Partial §
Complete ©
Comment
The analysis evaluates “Confidentiality©” as the primary impact where the internal file information is accessible, whereas treating "Integrity(I)" and "Availability(A)" as the secondary impacts.
Credit
Taku Toyama of NEC Corporation reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
Other Information