GNU C Library up to 2.26 memalign integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability was found in GNU C Library up to 2.26. It has been classified as critical. Impacted is an unknown function of the component memalign. The manipulation leads to integer overflow. This vulnerability is listed as CVE-2018-6485. 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 2.26 (Software Library). It has been rated as critical. This issue affects an unknown code block of the component memalign. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An integer overflow in the implementation of the posix_memalign in memalign functions in the GNU C Library (aka glibc or libc6) 2.26 and earlier could cause these functions to return a pointer to a heap area that is too small, potentially leading to heap corruption.

The bug was discovered 02/01/2018. The weakness was presented 02/01/2018 by Jakub Wilk (Website). The advisory is shared at bugs.debian.org. The identification of this vulnerability is CVE-2018-6485 since 02/01/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 107086 (SUSE SLES11 Security Update : glibc (SUSE-SU-2018:0565-1)), 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 237016 (Red Hat Update for glibc (RHSA-2018:3092)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (107086) and SecurityFocus (BID 102912†). See VDB-100924, VDB-110769, VDB-112777 and VDB-117986 for similar entries. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 107086
Nessus Name: SUSE SLES11 Security Update : glibc (SUSE-SU-2018:0565-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 63451
OpenVAS Name: SuSE Update for glibc openSUSE-SU-2018:0494-1 (glibc)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
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Timelineinfo

02/01/2018 🔍
02/01/2018 +0 days 🔍
02/01/2018 +0 days 🔍
02/01/2018 +0 days 🔍
02/01/2018 +0 days 🔍
02/02/2018 +1 days 🔍
02/28/2018 +26 days 🔍
03/01/2018 +1 days 🔍
02/03/2023 +1800 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: RHSA-2018:3092
Researcher: Jakub Wilk
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-6485 (🔍)
GCVE (CVE): GCVE-0-2018-6485
GCVE (VulDB): GCVE-100-112733
SecurityFocus: 102912 - GNU C Library CVE-2018-6485 Multiple Integer Overflow Vulnerabilities

See also: 🔍

Entryinfo

Created: 02/02/2018 08:01
Updated: 02/03/2023 12:41
Changes: 02/02/2018 08:01 (60), 01/01/2020 07:51 (13), 02/02/2021 14:09 (12), 02/03/2023 12:41 (3)
Complete: 🔍
Cache ID: 216:C1D:103

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