FreeBSD up to 11.1 sys/netsmb/smb_subr.c smb_strdupin out-of-bounds

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in FreeBSD up to 11.1. Affected by this issue is the function smb_strdupin of the file sys/netsmb/smb_subr.c. This manipulation causes out-of-bounds. This vulnerability is registered as CVE-2017-15037. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability classified as critical was found in FreeBSD up to 11.1 (Operating System). Affected by this vulnerability is the function smb_strdupin of the file sys/netsmb/smb_subr.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In FreeBSD through 11.1, the smb_strdupin function in sys/netsmb/smb_subr.c has a race condition with a resultant out-of-bounds read, because it can cause t2p->t_name strings to lack a final '\0' character.

The bug was discovered 09/29/2017. The weakness was published 10/05/2017 as Bug 222687 as not defined bug report (Bugzilla). It is possible to read the advisory at bugs.freebsd.org. This vulnerability is known as CVE-2017-15037 since 10/05/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/15/2021).

The vulnerability was handled as a non-public zero-day exploit for at least 6 days. During that time the estimated underground price was around $5k-$25k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 101191†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.8

VulDB Base Score: 5.6
VulDB Temp Score: 5.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
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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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/29/2017 🔍
10/05/2017 +6 days 🔍
10/05/2017 +0 days 🔍
10/05/2017 +0 days 🔍
10/05/2017 +0 days 🔍
10/05/2017 +0 days 🔍
01/15/2021 +1198 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: Bug 222687
Researcher: Meng Xu
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-15037 (🔍)
GCVE (CVE): GCVE-0-2017-15037
GCVE (VulDB): GCVE-100-107515
SecurityFocus: 101191 - FreeBSD 'sys/netsmb/smb_subr.c' Local Race Condition Vulnerability

Entryinfo

Created: 10/05/2017 15:27
Updated: 01/15/2021 15:56
Changes: 10/05/2017 15:27 (61), 11/22/2019 13:34 (4), 01/15/2021 15:56 (3)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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