GNU C Library up to 2.22 strftime numeric error

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.
8.9	$0-$5k	0.00

Summaryinfo

A vulnerability was found in GNU C Library up to 2.22. It has been classified as problematic. This affects the function strftime. Performing a manipulation results in numeric error. This vulnerability was named CVE-2015-8776. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in GNU C Library up to 2.22 (Software Library). It has been classified as critical. This affects the function strftime. The manipulation with an unknown input leads to a numeric error vulnerability. CWE is classifying the issue as CWE-189. This is going to have an impact on confidentiality, and availability. The summary by CVE is:

The strftime function in the GNU C Library (aka glibc or libc6) before 2.23 allows context-dependent attackers to cause a denial of service (application crash) or possibly obtain sensitive information via an out-of-range time value.

The weakness was presented 04/19/2016 by Florian Weimer (Website). It is possible to read the advisory at lists.fedoraproject.org. This vulnerability is uniquely identified as CVE-2015-8776 since 01/19/2016. Attacking locally is a requirement. The requirement for exploitation is a authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 88767 (Debian DSA-3480-1 : eglibc - 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 and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196484 (Ubuntu Security Notification for Eglibc, Glibc Vulnerabilities (USN-2985-1)).

Upgrading to version 2.23 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (88767), SecurityFocus (BID 83277†) and Vulnerability Center (SBV-58086†). See VDB-10583, VDB-73929, VDB-75092 and VDB-79344 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Software Library

Vendor

• GNU

Name

• C Library

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22

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: 9.1
VulDB Meta Temp Score: 8.9

VulDB Base Score: 9.1
VulDB Temp Score: 8.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CVSSv2info

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

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
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: 88767
Nessus Name: Debian DSA-3480-1 : eglibc - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703480
OpenVAS Name: Debian Security Advisory DSA 3480-1 (eglibc - 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: C Library 2.23

Timelineinfo

01/04/2016 🔍
01/19/2016 +15 days 🔍
01/19/2016 +0 days 🔍
02/16/2016 +28 days 🔍
02/17/2016 +1 days 🔍
04/12/2016 +55 days 🔍
04/19/2016 +6 days 🔍
04/19/2016 +0 days 🔍
04/20/2016 +1 days 🔍
07/25/2022 +2287 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: RHSA-2017:1916
Researcher: Florian Weimer
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8776 (🔍)
GCVE (CVE): GCVE-0-2015-8776
GCVE (VulDB): GCVE-100-82563
SecurityFocus: 83277 - GNU glibc 'strftime()' Function Memory Corruption Vulnerability
Vulnerability Center: 58086 - F5 Multiple Big-IP and Big-IQ Products Remote DoS and Information Disclosure Vulnerability in glibc, Medium

See also: 🔍

Entryinfo

Created: 04/20/2016 11:04
Updated: 07/25/2022 11:08
Changes: 04/20/2016 11:04 (72), 02/04/2019 12:26 (14), 07/25/2022 11:01 (4), 07/25/2022 11:08 (1)
Complete: 🔍
Cache ID: 216::103

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

Discussion

Might our Artificial Intelligence support you?

Check our Alexa App!