International Components for Unicode up to 57.1 common/uloc.cpp uloc_acceptLanguageFromHTTP httpAcceptLanguage memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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9.6$0-$5k0.00

Summaryinfo

A vulnerability was found in International Components for Unicode up to 57.1. It has been rated as critical. This impacts the function uloc_acceptLanguageFromHTTP of the file common/uloc.cpp. Performing a manipulation of the argument httpAcceptLanguage with the input $software_input_value results in memory corruption. This vulnerability was named CVE-2016-6293. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as very critical, was found in International Components for Unicode up to 57.1. This affects the function uloc_acceptLanguageFromHTTP of the file common/uloc.cpp. The manipulation of the argument httpAcceptLanguage with the input value \0 leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The uloc_acceptLanguageFromHTTP function in common/uloc.cpp in International Components for Unicode (ICU) through 57.1 for C/C++ does not ensure that there is a '\0' character at the end of a certain temporary array, which allows remote attackers to cause a denial of service (out-of-bounds read) or possibly have unspecified other impact via a call with a long httpAcceptLanguage argument.

The weakness was presented 07/25/2016 (Website). It is possible to read the advisory at git.php.net. This vulnerability is uniquely identified as CVE-2016-6293 since 07/24/2016. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/09/2022).

The vulnerability scanner Nessus provides a plugin with the ID 92556 (PHP 7.0.x < 7.0.9 Multiple Vulnerabilities (httpoxy)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175896 (Debian Security Update for icu (DSA 3725-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (92556) and SecurityFocus (BID 92127†). See VDB-91670 for similar entry. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 92556
Nessus Name: PHP 7.0.x < 7.0.9 Multiple Vulnerabilities (httpoxy)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703725
OpenVAS Name: Debian Security Advisory DSA 3725-1 (icu - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: aa82e99ed8003c01f1ef4f0940e56b85c5b032d4

Timelineinfo

07/21/2016 🔍
07/24/2016 +3 days 🔍
07/25/2016 +1 days 🔍
07/25/2016 +0 days 🔍
07/25/2016 +0 days 🔍
07/26/2016 +1 days 🔍
07/26/2016 +0 days 🔍
09/09/2022 +2236 days 🔍

Sourcesinfo

Advisory: git.php.net
Status: Not defined

CVE: CVE-2016-6293 (🔍)
GCVE (CVE): GCVE-0-2016-6293
GCVE (VulDB): GCVE-100-90363

OVAL: 🔍

SecurityFocus: 92127 - ICU CVE-2016-6293 Out of Bounds Read Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 07/26/2016 12:26
Updated: 09/09/2022 14:22
Changes: 07/26/2016 12:26 (66), 03/10/2019 08:42 (13), 09/09/2022 14:22 (4)
Complete: 🔍
Cache ID: 216:B7B:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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