Linux Kernel up to 4.10.11 nfsd net/sunrpc/svc.c RPC Reply input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.10.11. It has been declared as problematic. This vulnerability affects unknown code of the file net/sunrpc/svc.c of the component nfsd. Such manipulation as part of RPC Reply leads to input validation. This vulnerability is listed as CVE-2017-7645. The attack may be performed from remote. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 4.10.11 (Operating System). Affected by this issue is some unknown processing of the file net/sunrpc/svc.c of the component nfsd. The manipulation as part of a RPC Reply leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. CVE summarizes:

The NFSv2/NFSv3 server in the nfsd subsystem in the Linux kernel through 4.10.11 allows remote attackers to cause a denial of service (system crash) via a long RPC reply, related to net/sunrpc/svc.c, fs/nfsd/nfs3xdr.c, and fs/nfsd/nfsxdr.c.

The bug was discovered 04/14/2017. The weakness was presented 04/18/2017 (Website). The advisory is available at securityfocus.com. This vulnerability is handled as CVE-2017-7645 since 04/10/2017. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 99719 (Fedora 25 : kernel (2017-7462231059)), 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 276635 (Fedora Security Update for kernel (FEDORA-2017-0aa0f69e0c)).

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 (99719) and SecurityFocus (BID 97950†). See VDB-99909 for similar entry. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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: 99719
Nessus Name: Fedora 25 : kernel (2017-7462231059)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for kernel FEDORA-2017-7462231059
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: git.kernel.org

Timelineinfo

04/10/2017 🔍
04/14/2017 +4 days 🔍
04/14/2017 +0 days 🔍
04/18/2017 +4 days 🔍
04/18/2017 +0 days 🔍
04/19/2017 +1 days 🔍
04/27/2017 +8 days 🔍
04/28/2017 +1 days 🔍
11/29/2022 +2041 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2017:1615⛔
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-7645 (🔍)
GCVE (CVE): GCVE-0-2017-7645
GCVE (VulDB): GCVE-100-99938

OVAL: 🔍

SecurityFocus: 97950 - Linux Kernel CVE-2017-7645 Multiple Denial of Service Vulnerabilities
OSVDB: - CVE-2017-7645 - Linux - Denial of Service Issue

See also: 🔍

Entryinfo

Created: 04/19/2017 11:43
Updated: 11/29/2022 15:24
Changes: 04/19/2017 11:43 (79), 09/15/2020 07:40 (7), 11/29/2022 15:24 (5)
Complete: 🔍
Cache ID: 216:B7E:103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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