SUSE Linux update for the Linux Kernel

1) Improper access control

EUVDB-ID: #VU11460

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-2015-1142857

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.
 
The weakness exists due to sending ethernet flow control pause frames via the PF. A remote attacker can trigger network congestion spreading and cause the service to crash.

Mitigation

Update the affected packages.

Vulnerable software versions

SUSE Linux: 12

CPE2.3

• cpe:2.3:o:suse:suse_linux:12:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2018-02/msg00041.html

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) Privilege escalation

EUVDB-ID: #VU10938

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-13215

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain elevated privileges on the target system.

The weakness exists due to a flaw in the Upstream kernel skcipher. A remote attacker can trick the victim into opening a specially crafted application and execute arbitrary code with elevated privileges.

Mitigation

Update the affected packages.

Vulnerable software versions

SUSE Linux: 12

CPE2.3

• cpe:2.3:o:suse:suse_linux:12:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2018-02/msg00041.html

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) Out-of-bounds read

EUVDB-ID: #VU9773

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-17741

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

Exploit availability: No

Description

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

The weakness exists due to an error in the KVM implementation in the Linux kernel. A local attacker can trigger write_mmio stack-based out-of-bounds read or possibly have unspecified other impact, related to arch/x86/kvm/x86.c and include/trace/events/kvm.h and cause the system to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Update the affected packages.

Vulnerable software versions

SUSE Linux: 12

CPE2.3

• cpe:2.3:o:suse:suse_linux:12:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2018-02/msg00041.html

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.

Is there known malware, which exploits this vulnerability?

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

4) Improper input validation

EUVDB-ID: #VU9775

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-17805

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The weakness exists due to the Salsa20 encryption algorithm in the Linux kernel does not correctly handle zero-length inputs. A local attacker able to use the AF_ALG-based skcipher interface (CONFIG_CRYPTO_USER_API_SKCIPHER) can trigger uninitialized-memory free and cause the kernel to crash or execute a specially crafted sequence of system calls that use the blkcipher_walk API.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Update the affected packages.

Vulnerable software versions

SUSE Linux: 12

CPE2.3

• cpe:2.3:o:suse:suse_linux:12:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2018-02/msg00041.html

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.

Is there known malware, which exploits this vulnerability?

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

5) Stack-based buffer overflow

EUVDB-ID: #VU9776

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-17806

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

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

The weakness exists due to the HMAC implementation (crypto/hmac.c) in the Linux kernel does not validate that the underlying cryptographic hash algorithm is unkeyed. A local attacker able to use the AF_ALG-based hash interface (CONFIG_CRYPTO_USER_API_HASH) and the SHA-3 hash algorithm (CONFIG_CRYPTO_SHA3) can execute a specially crafted sequence of system calls that encounter a missing SHA-3 initialization, trigger kernel stack buffer overflow and cause the system to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Update the affected packages.

Vulnerable software versions

SUSE Linux: 12

CPE2.3

• cpe:2.3:o:suse:suse_linux:12:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2018-02/msg00041.html

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.

Is there known malware, which exploits this vulnerability?

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

6) Null pointer dereference

EUVDB-ID: #VU10939

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-2017-18079

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 weakness exists in the drivers/input/serio/i8042.c due to the port->exists value can change after it is validated. A remote attacker can trigger NULL pointer dereference and cause the system to crash.

Mitigation

Update the affected packages.

Vulnerable software versions

SUSE Linux: 12

CPE2.3

• cpe:2.3:o:suse:suse_linux:12:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2018-02/msg00041.html

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) Information disclosure

EUVDB-ID: #VU9883

Risk: Low

CVSSv4.0: 5.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2017-5715

CWE-ID: CWE-200 - Information exposure

Exploit availability: Yes

Description

The vulnerability allows a local attacker to obtain potentially sensitive information.

The vulnerability exists in Intel CPU hardware due to improper implementation of the speculative execution of instructions. A local attacker can utilize branch target injection, execute arbitrary code, perform a side-channel attack and read sensitive memory information.

Mitigation

Update the affected packages.

Vulnerable software versions

SUSE Linux: 12

CPE2.3

• cpe:2.3:o:suse:suse_linux:12:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2018-02/msg00041.html

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.

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.

8) Race condition

EUVDB-ID: #VU10679

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-2018-1000004

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

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

The weakness exists due to race condition in the sound system. A remote attacker can trigger deadlock and cause the system to crash.

Mitigation

Update the affected packages.

Vulnerable software versions

SUSE Linux: 12

CPE2.3

• cpe:2.3:o:suse:suse_linux:12:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2018-02/msg00041.html

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.