SUSE Linux update for glibc
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 5 |
| CVE-ID | CVE-2017-12132 CVE-2017-8804 CVE-2018-1000001 CVE-2018-6485 CVE-2018-6551 |
| CWE-ID | CWE-451 CWE-400 CWE-124 CWE-190 |
| Exploitation vector | Network |
| Public exploit |
Public exploit code for vulnerability #2 is available. Public exploit code for vulnerability #3 is available. |
| Vulnerable software |
SUSE Linux Operating systems & Components / Operating system |
| Vendor | SUSE |
Security Bulletin
This security bulletin contains information about 5 vulnerabilities.
1) Spoofing attack
EUVDB-ID: #VU12270
Risk: Low
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2017-12132
CWE-ID:
CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform spoofing attack and write arbitrary files on the target system.
The weakness exists in the DNS stub resolver due to soliciting large UDP responses from name servers, potentially simplifying off-path DNS spoofing attacks due to IP fragmentation, when EDNS support is enabled. A remote attacker can write arbitrary files.
Update the affected packages.
SUSE Linux: 12
CPE2.3 External linkshttps://lists.opensuse.org/opensuse-security-announce/2018-02/msg00026.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) Denial of service
EUVDB-ID: #VU6434
Risk: Medium
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:Green]
CVE-ID: CVE-2017-8804
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an error in xdr_bytes() and xdr_string() functions when processing RPC data in the GNU C Library (aka glibc or libc6). A remote unauthenticated attacker can send a specially crafted UDP request to port 111 (rpcbind) and consume up to 4 gigabytes of memory per request.
Successful exploitation of this vulnerability may result in denial of service (DoS) conditions.
The issue is related to: https://www.cybersecurity-help.cz/vdb/SB2017050801
Update the affected packages.
SUSE Linux: 12
CPE2.3 External linkshttps://lists.opensuse.org/opensuse-security-announce/2018-02/msg00026.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. However, proof of concept for this vulnerability is available.
3) Privilege escalation
EUVDB-ID: #VU9992
Risk: Low
CVSSv4.0: 8.5 [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:A/U:Clear]
CVE-ID: CVE-2018-1000001
CWE-ID:
CWE-124 - Buffer Underwrite ('Buffer Underflow')
Exploit availability: Yes
DescriptionThe vulnerability allows a local attacker to gain elevated privileges on the target system.
The weakness exists in due to a change in the processing of pathnames in the getcwd() command introduced in Linux kernel. A local attacker can use a specially crafted application, trigger buffer underflow in the __realpath() function in 'stdlib/canonicalize.c' and execute arbitrary code with root privileges.
Successful exploitation of the vulnerability may result in system compromise.
Update the affected packages.
SUSE Linux: 12
CPE2.3 External linkshttps://lists.opensuse.org/opensuse-security-announce/2018-02/msg00026.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, a fully functional exploit for this vulnerability is available.
4) Integer overflow
EUVDB-ID: #VU11548
Risk: Low
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/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-2018-6485
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain elevated privileges on the target system.
The weakness exists in the implementation of the posix_memalign in memalign functions due to integer overflow when causing these functions to return a pointer to a heap area that is too small. A remote attacker can trigger memory corruption and gain root privileges.
Update the affected packages.
SUSE Linux: 12
CPE2.3 External linkshttps://lists.opensuse.org/opensuse-security-announce/2018-02/msg00026.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.
5) Integer overflow
EUVDB-ID: #VU11549
Risk: Low
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/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-2018-6551
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain elevated privileges on the target system.
The weakness exists in the malloc implementation due to improper handling of malloc calls with arguments close to SIZE_MAX and returning a pointer to a heap region that is smaller than requested. A remote attacker can gain root privileges.
Update the affected packages.
SUSE Linux: 12
CPE2.3 External linkshttps://lists.opensuse.org/opensuse-security-announce/2018-02/msg00026.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.
