GNU libidn up to 1.32 lib/idna.c idna_to_ascii_4i out-of-bounds

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7.3	$0-$5k	0.00

Summaryinfo

A vulnerability marked as problematic has been reported in GNU libidn up to 1.32. The affected element is the function idna_to_ascii_4i in the library lib/idna.c. The manipulation leads to out-of-bounds. This vulnerability is documented as CVE-2016-6261. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in GNU libidn up to 1.32. This issue affects the function idna_to_ascii_4i in the library lib/idna.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is availability. The summary by CVE is:

The idna_to_ascii_4i function in lib/idna.c in libidn before 1.33 allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via 64 bytes of input.

The weakness was released 09/07/2016 by Hanno Boeck (Website). The advisory is shared at git.savannah.gnu.org. The identification of this vulnerability is CVE-2016-6261 since 07/21/2016. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 93292 (SUSE SLED12 / SLES12 Security Update : libidn (SUSE-SU-2016:2079-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169072 (SUSE Enterprise Linux Security Update for libidn (SUSE-SU-2016:2079-1)).

Upgrading to version 1.33 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 (93292) and SecurityFocus (BID 92070†). Entries connected to this vulnerability are available at VDB-91349, VDB-91362 and VDB-91363. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• GNU

Name

• libidn

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
• 1.31
• 1.32

License

• open-source

Website

• Vendor: https://www.gnu.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / 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: 93292
Nessus Name: SUSE SLED12 / SLES12 Security Update : libidn (SUSE-SU-2016:2079-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 866468
OpenVAS Name: Ubuntu Update for libidn USN-3068-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libidn 1.33
Patch: git.savannah.gnu.org

Timelineinfo

07/20/2016 🔍
07/21/2016 +1 days 🔍
08/16/2016 +26 days 🔍
09/02/2016 +17 days 🔍
09/07/2016 +5 days 🔍
09/07/2016 +0 days 🔍
09/08/2016 +1 days 🔍
09/15/2022 +2198 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: USN-3068-1
Researcher: Hanno Boeck
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-6261 (🔍)
GCVE (CVE): GCVE-0-2016-6261
GCVE (VulDB): GCVE-100-91361

OVAL: 🔍

SecurityFocus: 92070 - GNU Libidn Multiple Remote Security Vulnerabilities

See also: 🔍

Entryinfo

Created: 09/08/2016 21:58
Updated: 09/15/2022 08:56
Changes: 09/08/2016 21:58 (66), 04/12/2019 00:50 (14), 09/15/2022 08:56 (5)
Complete: 🔍
Cache ID: 216:EA5:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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