IBM RackSwitch firmware update for Libxml2

1) Out-of-bounds read

EUVDB-ID: #VU46737

Risk: Medium

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

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

Install update from vendor's website.

Vulnerable software versions

IBM RackSwitch G8124E: before 7.11.20.0

IBM RackSwitch G8124: before 7.11.20.0

IBM RackSwitch G8052: before 7.11.20.0

IBM RackSwitch G7028: before 7.6.8.0

CPE2.3

• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8124e:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8124:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8052:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g7028:*:*:*:*:*:*:*:*

External links

https://www.ibm.com/support/pages/node/6431299

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

2) Infinite loop

EUVDB-ID: #VU24488

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-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

Install update from vendor's website.

Vulnerable software versions

IBM RackSwitch G8124E: before 7.11.20.0

IBM RackSwitch G8124: before 7.11.20.0

IBM RackSwitch G8052: before 7.11.20.0

IBM RackSwitch G7028: before 7.6.8.0

CPE2.3

• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8124e:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8124:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8052:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g7028:*:*:*:*:*:*:*:*

External links

https://www.ibm.com/support/pages/node/6431299

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

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

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-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

Install update from vendor's website.

Vulnerable software versions

IBM RackSwitch G8124E: before 7.11.20.0

IBM RackSwitch G8124: before 7.11.20.0

IBM RackSwitch G8052: before 7.11.20.0

IBM RackSwitch G7028: before 7.6.8.0

CPE2.3

• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8124e:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8124:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8052:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g7028:*:*:*:*:*:*:*:*

External links

https://www.ibm.com/support/pages/node/6431299

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

4) Memory leak

EUVDB-ID: #VU24489

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-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

Install update from vendor's website.

Vulnerable software versions

IBM RackSwitch G8124E: before 7.11.20.0

IBM RackSwitch G8124: before 7.11.20.0

IBM RackSwitch G8052: before 7.11.20.0

IBM RackSwitch G7028: before 7.6.8.0

CPE2.3

• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8124e:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8124:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8052:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g7028:*:*:*:*:*:*:*:*

External links

https://www.ibm.com/support/pages/node/6431299

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

5) Null pointer dereference

EUVDB-ID: #VU13949

Risk: Low

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2018-14404

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists in the xmlXPathCompOpEval() function, as defined in the path.c source code file due to improper parsing of invalid XPath expressions in the XPATH_OP_AND and XPATH_OP_OR cases. A remote attacker can send a specially crafted request that submits malicious input to an application that is using the affected library, trigger a NULL pointer dereference and cause the application to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM RackSwitch G8124E: before 7.11.20.0

IBM RackSwitch G8124: before 7.11.20.0

IBM RackSwitch G8052: before 7.11.20.0

IBM RackSwitch G7028: before 7.6.8.0

CPE2.3

• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8124e:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8124:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8052:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g7028:*:*:*:*:*:*:*:*

External links

https://www.ibm.com/support/pages/node/6431299

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

6) XML External Entity injection

EUVDB-ID: #VU31830

Risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-9318

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

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to execute arbitrary code.

libxml2 2.9.4 and earlier, as used in XMLSec 1.2.23 and earlier and other products, does not offer a flag directly indicating that the current document may be read but other files may not be opened, which makes it easier for remote attackers to conduct XML External Entity (XXE) attacks via a crafted document.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM RackSwitch G8124E: before 7.11.20.0

IBM RackSwitch G8124: before 7.11.20.0

IBM RackSwitch G8052: before 7.11.20.0

IBM RackSwitch G7028: before 7.6.8.0

CPE2.3

• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8124e:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8124:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g8052:*:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_rackswitch_g7028:*:*:*:*:*:*:*:*

External links

https://www.ibm.com/support/pages/node/6431299

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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