Ubuntu update for ICU

Published: 2017-05-02

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2017-7867 CVE-2017-7868
CWE-ID	CWE-122
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Ubuntu Operating systems & Components / Operating system
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Heap-based buffer overflow

EUVDB-ID: #VU7568

Risk: High

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

CVE-ID: CVE-2017-7867

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

Exploit availability: No

Description

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

The vulnerability exists due to boundary error in utf8TextAccess() function in common/utext.cpp and the utext_moveIndex32* function in International Components for Unicode (ICU) for C/C++ before 2017-02-13. A remote unauthenticated attacker can trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages

Ubuntu 17.04:

libicu57 57.1-5ubuntu0.1

Ubuntu 16.10:

libicu57 57.1-4ubuntu0.2

Ubuntu 16.04 LTS:

libicu55 55.1-7ubuntu0.2

Ubuntu 14.04 LTS:

libicu52 52.1-3ubuntu0.6

Vulnerable software versions

Ubuntu: 14.04 - 17.04

CPE2.3

External links

https://www.ubuntu.com/usn/usn-3274-1/

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) Heap-based buffer overflow

EUVDB-ID: #VU7569