Fedora 24 update for kernel

Published: 2017-07-24 | Updated: 2025-04-24

Risk	Low
Patch available	YES
Number of vulnerabilities	4
CVE-ID	CVE-2017-7541 CVE-2017-11473 CVE-2017-7542 CVE-2017-11176
CWE-ID	CWE-119 CWE-120 CWE-835 CWE-190 CWE-476
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #4 is available.
Vulnerable software	Fedora Operating systems & Components / Operating system kernel Operating systems & Components / Operating system package or component
Vendor	Fedoraproject

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU7585

Risk: Low

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

CVE-ID: CVE-2017-7541

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a local attacker to execute arbitrary code on the target system with elevated privileges.

The vulnerability exists due to boundary error in brcmf_cfg80211_mgmt_tx() function in drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c in the Linux kernel before 4.12.3. A local user can create a specially crafted NL80211_CMD_FRAME Netlink packet and trigger DoS conditions or execute arbitrary code on the target system with elevated privileges.

Successful exploitation of this vulnerability may allow an attacker to obtain elevated privileges.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 24

kernel: before 4.11.12-100.fc24

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2017-544eef948f

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) Buffer overflow

EUVDB-ID: #VU12137

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-11473

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

Description

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

The weakness exists in the mp_override_legacy_irq() function in arch/x86/kernel/acpi/boot.c due to buffer overflow. A local attacker can submit a specially crafted ACPI table, trigger memory corruption and gain root privileges.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 24

kernel: before 4.11.12-100.fc24

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2017-544eef948f

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) Denial of service

EUVDB-ID: #VU10722

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-2017-7542

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

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

The weakness exists in the ip6_find_1stfragopt function in net/ipv6/output_core.c due to leveraging the ability to open a raw socket. A local attacker can trigger integer overflow and infinite loop and cause a denial of service.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 24

kernel: before 4.11.12-100.fc24

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2017-544eef948f

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) NULL pointer dereference

EUVDB-ID: #VU16551

Risk: Low

CVSSv4.0: 7.7 [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:P/U:Clear]

CVE-ID: CVE-2017-11176

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to cause DoS condition.

The vulnerability exists due to the mq_notify function does not set the sock pointer to NULL upon entry into the retry logic. A remote attacker can trigger use-after-free error during a user-space close of a Netlink socket and cause the service to crash.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 24

kernel: before 4.11.12-100.fc24

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2017-544eef948f

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.