OpenSUSE Linux update for glibc

1) Memory leak

EUVDB-ID: #VU37574

Risk: Medium

CVSSv3.1: 7.4 [AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C]

CVE-ID: CVE-2017-1000408

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

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within glibc 2.1.1 (released on May 24, 1999) can be reached and amplified through the LD_HWCAP_MASK environment variable. Please note that many versions of glibc are not vulnerable to this issue if patched for CVE-2017-1000366. A remote attacker can perform a denial of service attack.

Mitigation

Update the affected packages.

Vulnerable software versions

Opensuse: 42.2 - 42.3

External links

http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00040.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.

2) Buffer overflow

EUVDB-ID: #VU37575

Risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2017-1000409

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

A buffer overflow in glibc 2.5 (released on September 29, 2006) and can be triggered through the LD_LIBRARY_PATH environment variable. Please note that many versions of glibc are not vulnerable to this issue if patched for CVE-2017-1000366.

Mitigation

Update the affected packages.

Vulnerable software versions

Opensuse: 42.2 - 42.3

External links

http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00040.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.

3) Memory corruption

EUVDB-ID: #VU11544

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-2017-15670

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The weakness exists in the glob function in glob.c due to off-by-one error. A remote attacker can trigger heap-based buffer overflow and execute arbitrary code with root privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update the affected packages.

Vulnerable software versions

Opensuse: 42.2 - 42.3

External links

http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00040.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.

4) Memory leak

EUVDB-ID: #VU11545

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-2017-15671

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

Exploit availability: No

Description

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

The weakness exists in the glob function in glob.c due to it skips freeing allocated memory when processing the ~ operator with a long user name when invoked with GLOB_TILDE. A remote attacker can trigger memory corruption and cause the service to crash.

Mitigation

Update the affected packages.

Vulnerable software versions

Opensuse: 42.2 - 42.3

External links

http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00040.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) Buffer overflow

EUVDB-ID: #VU11546

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-2017-15804

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists in the glob function in glob.c due to buffer overflow during unescaping of user names with the ~ operator. A remote attacker can trigger memory corruption and execute arbitrary code.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update the affected packages.

Vulnerable software versions

Opensuse: 42.2 - 42.3

External links

http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00040.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.

6) Insecure DLL loading

EUVDB-ID: #VU11547

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-16997

CWE-ID: CWE-427 - Uncontrolled Search Path Element

Exploit availability: No

Description

The vulnerability allows a local attacker to compromise vulnerable system.

The weakness exists in elf/dl-load.c due to insecure .dll loading mechanism when opening files. Alocal attacker can place a file along with specially crafted .dll file on a remote SBM or WebDAV share and execute arbitrary code on the target system with elevated privileges.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Update the affected packages.

Vulnerable software versions

Opensuse: 42.2 - 42.3

External links

http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00040.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.

7) Privilege escalation

EUVDB-ID: #VU9992

Risk: Low

CVSSv3.1: 8.6 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/RL:U/RC:C]

CVE-ID: CVE-2018-1000001

CWE-ID: CWE-124 - Buffer Underwrite ('Buffer Underflow')

Exploit availability: Yes

Description

The 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.

Mitigation

Update the affected packages.

Vulnerable software versions

Opensuse: 42.2 - 42.3

External links

http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00040.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.