Debian update for qemu

1) Information disclosure

EUVDB-ID: #VU9883

Risk: Low

CVSSv3.1: 5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2017-5715

CWE-ID: CWE-200 - Information exposure

Exploit availability: Yes

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.

Update the affected package to version: 1:2.8+dfsg-6+deb9u4

Debian Linux: All versions

http://www.debian.org/security/2018/dsa-4213

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.

2) Race condition

EUVDB-ID: #VU13050

Risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-15038

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

Exploit availability: No

Update the affected package to version: 1:2.8+dfsg-6+deb9u4

Debian Linux: All versions

http://www.debian.org/security/2018/dsa-4213

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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

3) Resource exhaustion

EUVDB-ID: #VU11231

Risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-15119

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

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

The weakness exists due to resource exhaustion when sending large option requests, making the server waste CPU time on reading up to 4GB per request. A remote attacker can cause the service to crash.

Update the affected package to version: 1:2.8+dfsg-6+deb9u4

Debian Linux: All versions

http://www.debian.org/security/2018/dsa-4213

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) Memory allocation

EUVDB-ID: #VU11232

Risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-15124

CWE-ID: CWE-789 - Uncontrolled Memory Allocation

Exploit availability: No

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

The weakness exists due to uncontrolled memory allocation when not throttling the framebuffer updates sent to the client. A remote attacker can cause the service to crash.

Update the affected package to version: 1:2.8+dfsg-6+deb9u4

Debian Linux: All versions

http://www.debian.org/security/2018/dsa-4213

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) Memory leak

EUVDB-ID: #VU12163

Risk: Low

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-2017-15268

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

Exploit availability: No

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

The weakness exists in io/channel-websock.c due to memory leak in slow data-channel read operations. A remote attacker can trigger memory corruption and cause the service to crash.

Update the affected package to version: 1:2.8+dfsg-6+deb9u4

Debian Linux: All versions

http://www.debian.org/security/2018/dsa-4213

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) Out-of-bounds write

EUVDB-ID: #VU11790

Risk: Low

CVSSv3.1: 5.9 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-15289

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

Exploit availability: No

The vulnerability allows an adjacent authenticated attacker to cause DoS condition on the target system.

The weakness exists in the mode4and5 write functions in hw/display/cirrus_vga.c due to out-of-bounds write. An adjacent attacker can trigger memory corruption and cause the service to crash via vectors related to dst calculation.

Update the affected package to version: 1:2.8+dfsg-6+deb9u4

Debian Linux: All versions

http://www.debian.org/security/2018/dsa-4213

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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

7) Out-of-bounds read

EUVDB-ID: #VU11233

Risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-16845

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

Exploit availability: No

The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.

The weakness exists due to out-of-bounds read. A remote attacker can cause the service to crash or execute arbitrary code.

Successful exploitation of the vulnerability may result in system compromise.

Update the affected package to version: 1:2.8+dfsg-6+deb9u4

Debian Linux: All versions

http://www.debian.org/security/2018/dsa-4213

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) Divide by zero

EUVDB-ID: #VU11234

Risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-17381

CWE-ID: CWE-369 - Divide By Zero

Exploit availability: No

The vulnerability allows an adjacent attacker to cause DoS condition on the target system.

The weakness exists due to divide by zero when unsetting vring alignment while updating Virtio rings. An adjacent attacker can cause the service to crash.

Update the affected package to version: 1:2.8+dfsg-6+deb9u4

Debian Linux: All versions

http://www.debian.org/security/2018/dsa-4213

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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

9) Integer overflow

EUVDB-ID: #VU11235

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-18043

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

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

The weakness exists due to integer overflow when incorrect handling of certain rounding operations. A local attacker can cause the service to crash.

Update the affected package to version: 1:2.8+dfsg-6+deb9u4

Debian Linux: All versions

http://www.debian.org/security/2018/dsa-4213

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.

10) Out-of-bounds read

EUVDB-ID: #VU10941

Risk: Low

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

CVE-ID: CVE-2018-5683

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

Exploit availability: No

The vulnerability allows an adjacent low-privileged attacker to cause DoS condition on the target system.

The weakness exists in the vga_draw_text function due to out-of-bounds read. A remote attacker can leverage improper memory address validation, trigger memory error and cause QEMU process to crash.

Update the affected package to version: 1:2.8+dfsg-6+deb9u4

Debian Linux: All versions

http://www.debian.org/security/2018/dsa-4213

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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

11) Memory corruption

EUVDB-ID: #VU11163

Risk: Medium

CVSSv3.1: 8.3 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-7550

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

The vulnerability allows an adjacent attacker to execute arbitrary code on the target system.

The weakness exists in the load_multiboot function due to out-of-bounds read or write. An adjacent attacker can load a kernel image during the boot process, which may cause the mh_load_end_addr address to be greater than the mh_bss_end_addr address, trigger memory corruption and execute arbitrary code.

Successful exploitation of the vulnerability may result in system compromise.

Update the affected package to version: 1:2.8+dfsg-6+deb9u4

Debian Linux: All versions

http://www.debian.org/security/2018/dsa-4213

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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