GNU C Library 2.26 malloc integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in GNU C Library 2.26. This vulnerability affects the function malloc. Performing a manipulation results in integer overflow. This vulnerability was named CVE-2017-17426. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in GNU C Library 2.26 (Software Library). This affects the function malloc. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.

The bug was discovered 12/06/2017. The weakness was presented 12/05/2017 as Bug 22375 as not defined bug report (Bugzilla). It is possible to read the advisory at sourceware.org. This vulnerability is uniquely identified as CVE-2017-17426 since 12/05/2017. 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 vulnerability scanner Nessus provides a plugin with the ID 106014 (Fedora 27 : glibc (2017-fb5e227432)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197022 (Ubuntu Security Notification for Eglibc, Glibc Vulnerabilities (USN-3534-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (106014). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
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: 106014
Nessus Name: Fedora 27 : glibc (2017-fb5e227432)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 835249
OpenVAS Name: Fedora Update for glibc FEDORA-2017-fb5e227432
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: 34697694e8a93b325b18f25f7dcded55d6baeaf6

Timelineinfo

12/05/2017 🔍
12/05/2017 +0 days 🔍
12/05/2017 +0 days 🔍
12/05/2017 +0 days 🔍
12/06/2017 +1 days 🔍
12/19/2017 +13 days 🔍
01/15/2018 +27 days 🔍
01/17/2023 +1828 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: Bug 22375
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-17426 (🔍)
GCVE (CVE): GCVE-0-2017-17426
GCVE (VulDB): GCVE-100-110223

Entryinfo

Created: 12/05/2017 21:48
Updated: 01/17/2023 08:16
Changes: 12/05/2017 21:48 (73), 12/12/2019 09:40 (4), 01/17/2023 08:16 (4)
Complete: 🔍
Cache ID: 216::103

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