Buffer overflow in International Components for Unicode (ICU)

1) Stack-based buffer overflow

EUVDB-ID: #VU45694

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-2011-4599

CWE-ID: CWE-121 - Stack-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 a boundary error within the _canonicalize function in common/uloc.c when processing a crafted locale ID that is not properly handled during variant canonicalization. A remote unauthenticated attacker can trigger stack-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

Install update from vendor's website.

Vulnerable software versions

icu: 4.0 - 4.8.2

CPE2.3

• cpe:2.3:a:icu-project:international_components_for_unicode:4.0:*:*:*:*:*:*:*
• cpe:2.3:a:icu-project:international_components_for_unicode:4.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:icu-project:international_components_for_unicode:4.0.1.1:*:*:*:*:*:*:*

External links

https://bugs.icu-project.org/trac/ticket/8984
https://code.google.com/p/chromium/issues/detail?id=106441
https://lists.apple.com/archives/security-announce/2012/Sep/msg00003.html
https://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html
https://lists.opensuse.org/opensuse-updates/2012-01/msg00035.html
https://rhn.redhat.com/errata/RHSA-2011-1815.html
https://secunia.com/advisories/47146
https://secunia.com/advisories/47227
https://secunia.com/advisories/47674
https://secunia.com/advisories/47714
https://secunia.com/advisories/47775
https://support.apple.com/kb/HT5501
https://support.apple.com/kb/HT5503
https://ubuntu.com/usn/usn-1348-1
https://www.debian.org/security/2012/dsa-2397
https://www.mandriva.com/security/advisories?name=MDVSA-2011:194
https://www.openwall.com/lists/oss-security/2011/12/09/2
https://www.openwall.com/lists/oss-security/2011/12/09/5
https://www.osvdb.org/77698
https://www.securityfocus.com/bid/51006
https://exchange.xforce.ibmcloud.com/vulnerabilities/71726

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.