OpenSUSE Linux update for the Linux Kernel
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 5 |
| CVE-ID | CVE-2017-17805 CVE-2017-17806 CVE-2017-5715 CVE-2017-5753 CVE-2017-5754 |
| CWE-ID | CWE-20 CWE-121 CWE-200 |
| Exploitation vector | Local |
| Public exploit |
Public exploit code for vulnerability #3 is available. Vulnerability #4 is being exploited in the wild. Public exploit code for vulnerability #5 is available. |
| Vulnerable software Subscribe |
Linux kernel Operating systems & Components / Operating system Intel CPU Hardware solutions / Firmware |
| Vendor |
Linux Foundation Intel |
Security Bulletin
This security bulletin contains information about 5 vulnerabilities.
1) Improper input validation
EUVDB-ID: #VU9775
Risk: Low
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-2017-17805
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe 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.
Update the affected packages.
Linux kernel: 4.10.0 - 4.14.7
External linkshttp://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.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.
2) Stack-based buffer overflow
EUVDB-ID: #VU9776
Risk: Low
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-2017-17806
CWE-ID:
CWE-121 - Stack-based buffer overflow
Exploit availability: No
DescriptionThe 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.
Update the affected packages.
Linux kernel: 4.10.0 - 4.14.7
External linkshttp://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.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.
3) 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
DescriptionThe 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.
MitigationUpdate the affected packages.
Intel CPU: All versions
External linkshttp://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.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.
4) Information disclosure
EUVDB-ID: #VU9884
Risk: Low
CVSSv3.1: 6.2 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:H/RL:O/RC:C]
CVE-ID: CVE-2017-5753
CWE-ID:
CWE-200 - Information exposure
Exploit availability: Yes
DescriptionThe 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 perform a bounds check bypass, execute arbitrary code, conduct a side-channel attack and read sensitive memory information.
MitigationUpdate the affected packages.
Intel CPU: All versions
External linkshttp://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.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?
Yes. This vulnerability is being exploited in the wild.
5) Information disclosure
EUVDB-ID: #VU9882
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-2017-5754
CWE-ID:
CWE-200 - Information exposure
Exploit availability: Yes
DescriptionThe vulnerability allows a local attacker to obtain potentially sensitive information.
The vulnerability exists in Intel CPU hardware due to side-channel attacks, which are also referred to as Meltdown attacks. A local attacker can execute arbitrary code, perform a side-channel analysis of the data cache and gain access to sensitive information including memory from the CPU cache.
MitigationUpdate the affected packages.
Intel CPU: All versions
External linkshttp://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.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.
