SUSE update for libxml2

Published: 2021-05-19

Risk	High
Patch available	YES
Number of vulnerabilities	9
CVE-ID	CVE-2014-0191 CVE-2019-19956 CVE-2019-20388 CVE-2020-24977 CVE-2020-7595 CVE-2021-3516 CVE-2021-3517 CVE-2021-3518 CVE-2021-3537
CWE-ID	CWE-20 CWE-401 CWE-125 CWE-835 CWE-416 CWE-787 CWE-476
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	SUSE Linux Enterprise Point of Sale Operating systems & Components / Operating system SUSE Linux Enterprise Debuginfo Operating systems & Components / Operating system SUSE Linux Enterprise Server Operating systems & Components / Operating system libxml2-python-debugsource Operating systems & Components / Operating system package or component libxml2-python-debuginfo Operating systems & Components / Operating system package or component libxml2-debugsource Operating systems & Components / Operating system package or component libxml2-debuginfo Operating systems & Components / Operating system package or component libxml2-32bit Operating systems & Components / Operating system package or component libxml2-python Operating systems & Components / Operating system package or component libxml2-doc Operating systems & Components / Operating system package or component libxml2 Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 9 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU33820

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2014-0191

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The xmlParserHandlePEReference function in parser.c in libxml2 before 2.9.2, as used in Web Listener in Oracle HTTP Server in Oracle Fusion Middleware 11.1.1.7.0, 12.1.2.0, and 12.1.3.0 and other products, loads external parameter entities regardless of whether entity substitution or validation is enabled, which allows remote attackers to cause a denial of service (resource consumption) via a crafted XML document.

Mitigation

Update the affected package libxml2 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Point of Sale: 11-SP3

SUSE Linux Enterprise Debuginfo: 11-SP3 - 11-SP4

SUSE Linux Enterprise Server: 11-SP4-LTSS

libxml2-python-debugsource: before 2.7.6-0.77.36.1

libxml2-python-debuginfo: before 2.7.6-0.77.36.1

libxml2-debugsource: before 2.7.6-0.77.36.1

libxml2-debuginfo: before 2.7.6-0.77.36.1

libxml2-32bit: before 2.7.6-0.77.36.1

libxml2-python: before 2.7.6-0.77.36.1

libxml2-doc: before 2.7.6-0.77.36.1

libxml2: before 2.7.6-0.77.36.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-202114729-1/

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) Memory leak

EUVDB-ID: #VU24489

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19956

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak in xmlParseBalancedChunkMemoryRecover in parser.c. A remote attacker can trigger a memory leak related to newDoc->oldNs and perform denial of service attack.

Mitigation

Update the affected package libxml2 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Point of Sale: 11-SP3

SUSE Linux Enterprise Debuginfo: 11-SP3 - 11-SP4

SUSE Linux Enterprise Server: 11-SP4-LTSS

libxml2-python-debugsource: before 2.7.6-0.77.36.1

libxml2-python-debuginfo: before 2.7.6-0.77.36.1

libxml2-debugsource: before 2.7.6-0.77.36.1

libxml2-debuginfo: before 2.7.6-0.77.36.1

libxml2-32bit: before 2.7.6-0.77.36.1

libxml2-python: before 2.7.6-0.77.36.1

libxml2-doc: before 2.7.6-0.77.36.1

libxml2: before 2.7.6-0.77.36.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-202114729-1/

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.

3) Memory leak

EUVDB-ID: #VU24487

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-20388

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak in xmlSchemaPreRun in xmlschemas.c. A remote attacker can trigger a xmlSchemaValidateStream memory leak and perform denial of service attack.

Mitigation

Update the affected package libxml2 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Point of Sale: 11-SP3

SUSE Linux Enterprise Debuginfo: 11-SP3 - 11-SP4

SUSE Linux Enterprise Server: 11-SP4-LTSS

libxml2-python-debugsource: before 2.7.6-0.77.36.1

libxml2-python-debuginfo: before 2.7.6-0.77.36.1

libxml2-debugsource: before 2.7.6-0.77.36.1

libxml2-debuginfo: before 2.7.6-0.77.36.1

libxml2-32bit: before 2.7.6-0.77.36.1

libxml2-python: before 2.7.6-0.77.36.1

libxml2-doc: before 2.7.6-0.77.36.1

libxml2: before 2.7.6-0.77.36.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-202114729-1/

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.

4) Out-of-bounds read

EUVDB-ID: #VU46737

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-24977

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition within the xmlEncodeEntitiesInternal() function in libxml2/entities.c in libxml2. A remote attacker can pas specially crafted XML data to the affected application, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation

Update the affected package libxml2 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Point of Sale: 11-SP3

SUSE Linux Enterprise Debuginfo: 11-SP3 - 11-SP4

SUSE Linux Enterprise Server: 11-SP4-LTSS

libxml2-python-debugsource: before 2.7.6-0.77.36.1

libxml2-python-debuginfo: before 2.7.6-0.77.36.1

libxml2-debugsource: before 2.7.6-0.77.36.1

libxml2-debuginfo: before 2.7.6-0.77.36.1

libxml2-32bit: before 2.7.6-0.77.36.1

libxml2-python: before 2.7.6-0.77.36.1

libxml2-doc: before 2.7.6-0.77.36.1

libxml2: before 2.7.6-0.77.36.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-202114729-1/

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.

5) Infinite loop

EUVDB-ID: #VU24488

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-7595

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

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

The vulnerability exists due to infinite loop in xmlStringLenDecodeEntities in parser.c. A remote attacker can consume all available system resources and cause denial of service conditions in a certain end-of-file situation.

Mitigation

Update the affected package libxml2 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Point of Sale: 11-SP3

SUSE Linux Enterprise Debuginfo: 11-SP3 - 11-SP4

SUSE Linux Enterprise Server: 11-SP4-LTSS

libxml2-python-debugsource: before 2.7.6-0.77.36.1

libxml2-python-debuginfo: before 2.7.6-0.77.36.1

libxml2-debugsource: before 2.7.6-0.77.36.1

libxml2-debuginfo: before 2.7.6-0.77.36.1

libxml2-32bit: before 2.7.6-0.77.36.1

libxml2-python: before 2.7.6-0.77.36.1

libxml2-doc: before 2.7.6-0.77.36.1

libxml2: before 2.7.6-0.77.36.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-202114729-1/

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.

6) Use-after-free

EUVDB-ID: #VU54222

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3516

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in xmllint. A remote attacker can use a specially crafted file to execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Update the affected package libxml2 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Point of Sale: 11-SP3

SUSE Linux Enterprise Debuginfo: 11-SP3 - 11-SP4

SUSE Linux Enterprise Server: 11-SP4-LTSS

libxml2-python-debugsource: before 2.7.6-0.77.36.1

libxml2-python-debuginfo: before 2.7.6-0.77.36.1

libxml2-debugsource: before 2.7.6-0.77.36.1

libxml2-debuginfo: before 2.7.6-0.77.36.1

libxml2-32bit: before 2.7.6-0.77.36.1

libxml2-python: before 2.7.6-0.77.36.1

libxml2-doc: before 2.7.6-0.77.36.1

libxml2: before 2.7.6-0.77.36.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-202114729-1/

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.

7) Out-of-bounds write

EUVDB-ID: #VU54224

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3517

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in the xml entity encoding functionality. A remote attacker can create a specially crafted file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Update the affected package libxml2 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Point of Sale: 11-SP3

SUSE Linux Enterprise Debuginfo: 11-SP3 - 11-SP4

SUSE Linux Enterprise Server: 11-SP4-LTSS

libxml2-python-debugsource: before 2.7.6-0.77.36.1

libxml2-python-debuginfo: before 2.7.6-0.77.36.1

libxml2-debugsource: before 2.7.6-0.77.36.1

libxml2-debuginfo: before 2.7.6-0.77.36.1

libxml2-32bit: before 2.7.6-0.77.36.1

libxml2-python: before 2.7.6-0.77.36.1

libxml2-doc: before 2.7.6-0.77.36.1

libxml2: before 2.7.6-0.77.36.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-202114729-1/

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.

8) Use-after-free

EUVDB-ID: #VU54225

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3518

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in libxml2. A remote attacker can use a specially crafted file and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Update the affected package libxml2 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Point of Sale: 11-SP3

SUSE Linux Enterprise Debuginfo: 11-SP3 - 11-SP4

SUSE Linux Enterprise Server: 11-SP4-LTSS

libxml2-python-debugsource: before 2.7.6-0.77.36.1

libxml2-python-debuginfo: before 2.7.6-0.77.36.1

libxml2-debugsource: before 2.7.6-0.77.36.1

libxml2-debuginfo: before 2.7.6-0.77.36.1

libxml2-32bit: before 2.7.6-0.77.36.1

libxml2-python: before 2.7.6-0.77.36.1

libxml2-doc: before 2.7.6-0.77.36.1

libxml2: before 2.7.6-0.77.36.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-202114729-1/

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.

9) NULL pointer dereference

EUVDB-ID: #VU54223

Risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3537

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Update the affected package libxml2 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Point of Sale: 11-SP3

SUSE Linux Enterprise Debuginfo: 11-SP3 - 11-SP4

SUSE Linux Enterprise Server: 11-SP4-LTSS

libxml2-python-debugsource: before 2.7.6-0.77.36.1

libxml2-python-debuginfo: before 2.7.6-0.77.36.1

libxml2-debugsource: before 2.7.6-0.77.36.1

libxml2-debuginfo: before 2.7.6-0.77.36.1

libxml2-32bit: before 2.7.6-0.77.36.1

libxml2-python: before 2.7.6-0.77.36.1

libxml2-doc: before 2.7.6-0.77.36.1

libxml2: before 2.7.6-0.77.36.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-202114729-1/

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.