libin up to 1.30 UTF-8 stringprep_utf8_to_ucs4 memory corruption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1	$0-$5k	0.00

Summaryinfo

A vulnerability was found in libin up to 1.30 and classified as problematic. Impacted is the function stringprep_utf8_to_ucs4 of the component UTF-8 Handler. Such manipulation leads to memory corruption. This vulnerability is referenced as CVE-2015-2059. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in libin up to 1.30. Affected by this issue is the function stringprep_utf8_to_ucs4 of the component UTF-8 Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality. CVE summarizes:

The stringprep_utf8_to_ucs4 function in libin before 1.31, as used in jabberd2, allows context-dependent attackers to read system memory and possibly have other unspecified impact via invalid UTF-8 characters in a string, which triggers an out-of-bounds read.

The weakness was published 08/12/2015 by Thijs Alkemade (Website). The advisory is shared for download at github.com. This vulnerability is handled as CVE-2015-2059 since 02/23/2015. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 84835 (Debian DLA-277-1 : libidn security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169194 (OpenSuSE Security Update for wget (openSUSE-SU-2016:2277-1)).

Upgrading to version 1.31 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (84835), SecurityFocus (BID 72736†) and Vulnerability Center (SBV-51952†). Similar entry is available at VDB-77059. Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• libin

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28
• 1.29
• 1.30

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 84835
Nessus Name: Debian DLA-277-1 : libidn security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 703578
OpenVAS Name: Debian Security Advisory DSA 3578-1 (libidn - 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: 🔍

Upgrade: libin 1.31
Patch: git.savannah.gnu.org

Timelineinfo

10/22/2014 🔍
02/23/2015 +124 days 🔍
05/21/2015 +87 days 🔍
08/12/2015 +83 days 🔍
08/12/2015 +0 days 🔍
08/13/2015 +1 days 🔍
08/13/2015 +0 days 🔍
06/09/2022 +2492 days 🔍

Sourcesinfo

Advisory: USN-3068-1
Researcher: Thijs Alkemade
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-2059 (🔍)
GCVE (CVE): GCVE-0-2015-2059
GCVE (VulDB): GCVE-100-77060

OVAL: 🔍

SecurityFocus: 72736 - jabberd CVE-2015-2059 Out of Bounds Read Memory Corruption Vulnerability
Vulnerability Center: 51952 - libin <1.31 Unspecified Remote Vulnerability in stringprep_utf8_to_ucs4, High

See also: 🔍

Entryinfo

Created: 08/13/2015 10:16
Updated: 06/09/2022 09:56
Changes: 08/13/2015 10:16 (57), 10/14/2017 11:26 (16), 06/09/2022 09:55 (4), 06/09/2022 09:56 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

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