Multiple vulnerabilities in expat



Published: 2022-02-21 | Updated: 2022-06-17
Risk High
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2022-25236
CVE-2022-25313
CVE-2022-25235
CVE-2022-25314
CVE-2022-25315
CWE-ID CWE-20
CWE-121
CWE-94
CWE-190
Exploitation vector Network
Public exploit N/A
Vulnerable software
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expat
Universal components / Libraries / Libraries used by multiple products

Vendor libexpat.org

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU60733

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2022-25236

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

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

The vulnerability exists due to improper protection against insertion of namesep characters into namespace URIs in xmlparse.c. 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 website.

Vulnerable software versions

expat: 1.95.0 - 2.4.4


CPE2.3 External links

http://github.com/libexpat/libexpat/pull/561
http://www.openwall.com/lists/oss-security/2022/02/19/1

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Stack-based buffer overflow

EUVDB-ID: #VU60737

Risk: High

CVSSv3.1:

CVE-ID: CVE-2022-25313

CWE-ID: CWE-121 - Stack-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in build_model. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

expat: 1.95.0 - 2.4.4


CPE2.3 External links

http://github.com/libexpat/libexpat/pull/558
http://www.openwall.com/lists/oss-security/2022/02/19/1

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

3) Code Injection

EUVDB-ID: #VU60736

Risk: High

CVSSv3.1:

CVE-ID: CVE-2022-25235

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to the affected application lacks certain validation of encoding, such as checks for whether a UTF-8 character is valid in a certain context. A remote attacker can send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

expat: 1.95.0 - 2.4.4


CPE2.3 External links

http://github.com/libexpat/libexpat/pull/562
http://www.openwall.com/lists/oss-security/2022/02/19/1

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

4) Integer overflow

EUVDB-ID: #VU60738

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2022-25314

CWE-ID: CWE-190 - Integer Overflow or Wraparound

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow in copyString. A remote attacker can pass specially crafted data to the application, trigger integer overflow and cause a denial of service condition on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

expat: 1.95.0 - 2.4.4


CPE2.3 External links

http://github.com/libexpat/libexpat/pull/560
http://www.openwall.com/lists/oss-security/2022/02/19/1

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

5) Integer overflow

EUVDB-ID: #VU60739

Risk: High

CVSSv3.1:

CVE-ID: CVE-2022-25315

CWE-ID: CWE-190 - Integer Overflow or Wraparound

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow in storeRawNames function. A remote attacker can pass specially crafted data to the application, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

expat: 1.95.0 - 2.4.4


CPE2.3 External links

http://github.com/libexpat/libexpat/pull/559
http://www.openwall.com/lists/oss-security/2022/02/19/1

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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