openEuler update for expat

Published: 2024-04-12

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-52426 CVE-2024-28757
CWE-ID	CWE-776 CWE-611
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	openEuler Operating systems & Components / Operating system expat-help Operating systems & Components / Operating system package or component expat-debuginfo Operating systems & Components / Operating system package or component expat-devel Operating systems & Components / Operating system package or component expat-debugsource Operating systems & Components / Operating system package or component expat Operating systems & Components / Operating system package or component
Vendor	openEuler

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) XML Entity Expansion

EUVDB-ID: #VU86231

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-52426

CWE-ID: CWE-776 - Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to recursive XML Entity Expansion if XML_DTD is undefined at compile time. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 22.03 LTS

expat-help: before 2.2.9-11

expat-debuginfo: before 2.2.9-11

expat-devel: before 2.2.9-11

expat-debugsource: before 2.2.9-11

expat: before 2.2.9-11

CPE2.3

External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2024-1379

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) XML External Entity injection

EUVDB-ID: #VU87337

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-28757

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied XML input when using external parsers via XML_ExternalEntityParserCreate. A remote attacker can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.

Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 22.03 LTS

expat-help: before 2.2.9-11

expat-debuginfo: before 2.2.9-11

expat-devel: before 2.2.9-11

expat-debugsource: before 2.2.9-11

expat: before 2.2.9-11

CPE2.3

External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2024-1379

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.