GNU C Library up to 2.21 __libc_use_alloca 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 has been found in GNU C Library up to 2.21 and classified as problematic. This affects the function __libc_use_alloca. This manipulation causes memory corruption. This vulnerability is tracked as CVE-2015-1473. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in GNU C Library up to 2.21 (Software Library). Affected by this vulnerability is the function __libc_use_alloca. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability.

The weakness was disclosed 02/21/2015 by Florian Weimer as Bug 16618 as confirmed bug report (Bugzilla). It is possible to read the advisory at sourceware.org. This vulnerability is known as CVE-2015-1473 since 02/03/2015. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 82149 (Debian DLA-165-1 : 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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350085 (Amazon Linux Security Advisory for glibc: ALAS-2015-617).

Upgrading to version 2.21 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (82149), SecurityFocus (BID 72499†), SecurityTracker (ID 1031818†) and Vulnerability Center (SBV-49734†). The entries VDB-69246 and VDB-69278 are pretty similar. Be aware that VulDB is the high quality source 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

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: 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
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: 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: 82149
Nessus Name: Debian DLA-165-1 : eglibc security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 14611
OpenVAS Name: Amazon Linux Local Check: alas-2015-617
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 2.21
Patch: 5bd80bfe9ca0d955bfbbc002781bc7b01b6bcb06

Timelineinfo

02/03/2015 🔍
02/03/2015 +0 days 🔍
02/03/2015 +0 days 🔍
02/21/2015 +18 days 🔍
02/27/2015 +6 days 🔍
03/03/2015 +4 days 🔍
04/08/2015 +36 days 🔍
04/16/2015 +8 days 🔍
03/11/2022 +2520 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: Bug 16618
Researcher: Florian Weimer
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-1473 (🔍)
GCVE (CVE): GCVE-0-2015-1473
GCVE (VulDB): GCVE-100-69247

OVAL: 🔍

SecurityFocus: 72499 - glibc CVE-2015-1473 Unspecified Security Vulnerability
SecurityTracker: 1031818 - Glibc Buffer Overflow in vfscanf May Let Remote or Local Users Execute Arbitrary Code
Vulnerability Center: 49734 - GNU glibc before 2.21 Remote DoS or Memory Overwrite via a Crafted Long Line Related to a Wscanf Call, Medium

See also: 🔍

Entryinfo

Created: 03/03/2015 09:38
Updated: 03/11/2022 00:26
Changes: 03/03/2015 09:38 (69), 06/26/2017 10:45 (10), 03/11/2022 00:15 (5), 03/11/2022 00:26 (1)
Complete: 🔍
Cache ID: 216:41B:103

Be aware that VulDB is the high quality source for vulnerability data.

Discussion

Want to stay up to date on a daily basis?

Enable the mail alert feature now!