GNU C Library up to 2.27 mempcpy __mempcpy_avx512_no_vzeroupper memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in GNU C Library up to 2.27. Affected by this issue is the function __mempcpy_avx512_no_vzeroupper of the component mempcpy. Performing a manipulation results in memory corruption. This vulnerability is reported as CVE-2018-11237. The attack is possible to be carried out remotely. Moreover, an exploit is present. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in GNU C Library up to 2.27 (Software Library). It has been classified as critical. This affects the function __mempcpy_avx512_no_vzeroupper of the component mempcpy. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An AVX-512-optimized implementation of the mempcpy function in the GNU C Library (aka glibc or libc6) 2.27 and earlier may write data beyond the target buffer, leading to a buffer overflow in __mempcpy_avx512_no_vzeroupper.

The bug was discovered 05/17/2018. The weakness was disclosed 05/18/2018 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is uniquely identified as CVE-2018-11237 since 05/18/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 110393 (SUSE SLED12 / SLES12 Security Update : glibc (SUSE-SU-2018:1562-1)), 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 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (44750), Tenable (110393) and SecurityFocus (BID 104256†). The entries VDB-110769, VDB-112733, VDB-117980 and VDB-117986 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 110393
Nessus Name: SUSE SLED12 / SLES12 Security Update : glibc (SUSE-SU-2018:1562-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 59235
OpenVAS Name: Fedora Update for glibc FEDORA-2018-916dfe0d86
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
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Timelineinfo

05/17/2018 🔍
05/18/2018 +0 days 🔍
05/18/2018 +0 days 🔍
05/18/2018 +0 days 🔍
05/18/2018 +0 days 🔍
05/19/2018 +1 days 🔍
06/06/2018 +18 days 🔍
06/07/2018 +1 days 🔍
03/14/2023 +1741 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: RHSA-2018:3092⛔
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-11237 (🔍)
GCVE (CVE): GCVE-0-2018-11237
GCVE (VulDB): GCVE-100-117987
SecurityFocus: 104256 - GNU glibc CVE-2018-11237 Local Buffer Overflow Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 05/19/2018 09:17
Updated: 03/14/2023 10:58
Changes: 05/19/2018 09:17 (77), 02/07/2020 13:08 (9), 03/14/2023 10:58 (4)
Complete: 🔍
Cache ID: 216::103

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