openEuler 20.03 LTS SP1 update for openvswitch



Published: 2021-05-06
Risk High
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2020-35498
CVE-2020-27827
CVE-2015-8011
CWE-ID CWE-20
CWE-401
CWE-119
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Subscribe 		openEuler
Operating systems & Components / Operating system

openvswitch-debugsource
Operating systems & Components / Operating system package or component

openvswitch-debuginfo
Operating systems & Components / Operating system package or component

openvswitch-devel
Operating systems & Components / Operating system package or component

openvswitch-help
Operating systems & Components / Operating system package or component

openvswitch
Operating systems & Components / Operating system package or component

Vendor openEuler

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU50603

Risk: Medium

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-35498

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

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

The vulnerability exists due to insufficient validation of user-supplied input when processing network packets. A remote attacker can send specially crafted traffic to the system and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1

openvswitch-debugsource: before 2.12.0-11

openvswitch-debuginfo: before 2.12.0-11

openvswitch-devel: before 2.12.0-11

openvswitch-help: before 2.12.0-11

openvswitch: before 2.12.0-11

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1179


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. However, proof of concept for this vulnerability is available.

2) Memory leak

EUVDB-ID: #VU49910

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-2020-27827

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 lldpd when processing packets with multiple instances of certain TLVs. A remote attacker can send specially crafted traffic to the system and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1

openvswitch-debugsource: before 2.12.0-11

openvswitch-debuginfo: before 2.12.0-11

openvswitch-devel: before 2.12.0-11

openvswitch-help: before 2.12.0-11

openvswitch: before 2.12.0-11

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1179


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) Buffer overflow

EUVDB-ID: #VU48780

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-2015-8011

CWE-ID: CWE-119 - Memory corruption

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 within the lldp_decode() function in daemon/protocols/lldp.c in lldpd. A remote attacker can pass specially crafted data to the application, trigger memory corruption 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 repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1

openvswitch-debugsource: before 2.12.0-11

openvswitch-debuginfo: before 2.12.0-11

openvswitch-devel: before 2.12.0-11

openvswitch-help: before 2.12.0-11

openvswitch: before 2.12.0-11

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1179


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.



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