Linux Kernel up to 4.10.12 MACsec drivers/net/macsec.c skb_to_sgvec memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.10.12 and classified as critical. The impacted element is the function skb_to_sgvec of the file drivers/net/macsec.c of the component MACsec Module. Such manipulation leads to memory corruption. This vulnerability is referenced as CVE-2017-7477. The attack can only be performed from a local environment. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.10.12 (Operating System) and classified as critical. Affected by this issue is the function skb_to_sgvec of the file drivers/net/macsec.c of the component MACsec Module. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Heap-based buffer overflow in drivers/net/macsec.c in the MACsec module in the Linux kernel through 4.10.12 allows attackers to cause a denial of service or possibly have unspecified other impact by leveraging the use of a MAX_SKB_FRAGS+1 size in conjunction with the NETIF_F_FRAGLIST feature, leading to an error in the skb_to_sgvec function.

The bug was discovered 04/25/2017. The weakness was published 04/25/2017 as Bug 1445207 as not defined bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability is handled as CVE-2017-7477 since 04/05/2017. The attack needs to be approached locally. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 99987 (Fedora 24 : kernel (2017-0aa0f69e0c)), 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 351446 (Amazon Linux Security Advisory for kernel: ALAC2012-2018-012).

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 databases at Tenable (99987) and SecurityFocus (BID 98014†). Similar entries are available at VDB-96555, VDB-96560, VDB-96561 and VDB-96562. Once again VulDB remains the best source for vulnerability data.

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CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.6

VulDB Base Score: 4.5
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.0
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 99987
Nessus Name: Fedora 24 : kernel (2017-0aa0f69e0c)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for kernel FEDORA-2017-17d1c05236
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Patch: git.kernel.org

Timelineinfo

04/05/2017 🔍
04/25/2017 +20 days 🔍
04/25/2017 +0 days 🔍
04/25/2017 +0 days 🔍
04/25/2017 +0 days 🔍
04/25/2017 +0 days 🔍
05/04/2017 +9 days 🔍
05/05/2017 +1 days 🔍
12/02/2022 +2037 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 1445207
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-7477 (🔍)
GCVE (CVE): GCVE-0-2017-7477
GCVE (VulDB): GCVE-100-100580
SecurityFocus: 98014 - Linux Kernel CVE-2017-7477 Heap Buffer Overflow Vulnerability
OSVDB: - CVE-2017-7477 - Linux - Buffer Overflow Issue
SecurityTracker: 1038500

See also: 🔍

Entryinfo

Created: 04/25/2017 22:46
Updated: 12/02/2022 10:26
Changes: 04/25/2017 22:46 (86), 12/21/2020 13:52 (2), 12/02/2022 10:26 (3)
Complete: 🔍
Cache ID: 216::103

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