Linux Kernel up to 4.12.3 net/ipv6/output_core.c ip6_find_1stfragopt integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Linux Kernel up to 4.12.3. Affected by this issue is the function ip6_find_1stfragopt of the file net/ipv6/output_core.c. Executing a manipulation can lead to integer overflow. This vulnerability is registered as CVE-2017-7542. The attack needs to be launched locally. No exploit is available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.12.3 (Operating System). It has been declared as problematic. This vulnerability affects the function ip6_find_1stfragopt of the file net/ipv6/output_core.c. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. CVE summarizes:

The ip6_find_1stfragopt function in net/ipv6/output_core.c in the Linux kernel through 4.12.3 allows local users to cause a denial of service (integer overflow and infinite loop) by leveraging the ability to open a raw socket.

The bug was discovered 07/19/2017. The weakness was published 07/21/2017 as confirmed git commit (GIT Repository). The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2017-7542 since 04/05/2017. The attack needs to be approached locally. A single authentication is necessary for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 101992 (Fedora 25 : kernel (2017-39b5facda0)), 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 276758 (Fedora Security Update for kernel (FEDORA-2017-544eef948f)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. A possible mitigation has been published 5 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (101992) and SecurityFocus (BID 99953†). Similar entries are available at VDB-103407, VDB-104316 and VDB-104462. Once again VulDB remains the best 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: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
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: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 101992
Nessus Name: Fedora 25 : kernel (2017-39b5facda0)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703926
OpenVAS Name: Debian Security Advisory DSA 3927-1 (linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: git.kernel.org

Timelineinfo

04/05/2017 🔍
07/19/2017 +105 days 🔍
07/19/2017 +0 days 🔍
07/21/2017 +2 days 🔍
07/21/2017 +0 days 🔍
07/22/2017 +1 days 🔍
07/26/2017 +4 days 🔍
07/27/2017 +1 days 🔍
12/13/2022 +1965 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: FEDORA-2017-39b5facda0
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-7542 (🔍)
GCVE (CVE): GCVE-0-2017-7542
GCVE (VulDB): GCVE-100-104380

OVAL: 🔍

SecurityFocus: 99953 - Linux Kernel 'net/ipv6/output_core.c' Local Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 07/22/2017 09:44
Updated: 12/13/2022 14:33
Changes: 07/22/2017 09:44 (81), 10/31/2019 11:31 (5), 12/13/2022 14:28 (4), 12/13/2022 14:33 (1)
Complete: 🔍
Cache ID: 216::103

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