SB2017081502 - Arbitrary code execution in Mozilla NSS

Description

This security bulletin contains information about 4 vulnerabilities.

1) Heap-based buffer overflow (CVE-ID: CVE-2017-11695)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 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

The vulnerability allows a local attacker to gain elevated privileges.

The weakness exists due to heap-based buffer overflow in alloc_segs() in 'lib/dbm/src/hash.c'. A local attacker supply a specially crafted 'cert8.db' file, cause is to be processed by the NSS 'certutil' application and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

2) Heap-based buffer overflow (CVE-ID: CVE-2017-11696)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 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

The vulnerability allows a local attacker to gain elevated privileges.

The weakness exists due to heap-based buffer overflow in __hash_open() in 'lib/dbm/src/hash.c'. A local attacker supply a specially crafted 'cert8.db' file, cause is to be processed by the NSS 'certutil' application and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

3) Divide by zero (CVE-ID: CVE-2017-11697)

CWE-ID: CWE-369 - Divide By Zero

CVSSv4: 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

The vulnerability allows a local attacker to gain elevated privileges.

The weakness exists due to floating point exception in __hash_open() in 'hash.c'. A local attacker supply a specially crafted 'cert8.db' file, cause is to be processed by the NSS 'certutil' application and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

4) Heap-based buffer overflow (CVE-ID: CVE-2017-11698)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 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

The vulnerability allows a local attacker to gain elevated privileges.

The weakness exists due to heap-based buffer overflow in __get_page() in 'lib/dbm/src/h_page.c'. A local attacker supply a specially crafted 'cert8.db' file, cause is to be processed by the NSS 'certutil' application and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Remediation

Install update from vendor's website.

References

• http://www.geeknik.net/9brdqk6xu