cURL up to 7.58.0 FTP URL out-of-bounds write

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in cURL up to 7.58.0 and classified as critical. This issue affects some unknown processing of the component FTP URL Handler. Executing a manipulation can lead to out-of-bounds write. This vulnerability is registered as CVE-2018-1000120. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in cURL up to 7.58.0 (Network Utility Software). This vulnerability affects an unknown code of the component FTP URL Handler. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A buffer overflow exists in curl 7.12.3 to and including curl 7.58.0 in the FTP URL handling that allows an attacker to cause a denial of service or worse.

The bug was discovered 03/14/2018. The weakness was published 03/14/2018 (Website). The advisory is shared for download at curl.haxx.se. This vulnerability was named CVE-2018-1000120 since 03/08/2018. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 109508 (EulerOS 2.0 SP2 : curl (EulerOS-SA-2018-1110)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Huawei Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 237019 (Red Hat Update for curl and nss-pem (RHSA-2018:3157)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (109508) and SecurityFocus (BID 103414†). Similar entries are available at VDB-79791, VDB-95830, VDB-97118 and VDB-99028. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Network Utility Software

Name

• cURL

Version

• 7.0
• 7.1
• 7.2
• 7.3
• 7.4
• 7.5
• 7.6
• 7.7
• 7.8
• 7.9
• 7.10
• 7.11
• 7.12
• 7.13
• 7.14
• 7.15
• 7.16
• 7.17
• 7.18
• 7.19
• 7.20
• 7.21
• 7.22
• 7.23
• 7.24
• 7.25
• 7.26
• 7.27
• 7.28
• 7.29
• 7.30
• 7.31
• 7.32
• 7.33
• 7.34
• 7.35
• 7.36
• 7.37
• 7.38
• 7.39
• 7.40
• 7.41
• 7.42
• 7.43
• 7.44
• 7.45
• 7.46
• 7.47
• 7.48
• 7.49
• 7.50
• 7.51
• 7.52
• 7.53
• 7.54
• 7.55
• 7.56
• 7.57
• 7.58.0

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 109508
Nessus Name: EulerOS 2.0 SP2 : curl (EulerOS-SA-2018-1110)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 855603
OpenVAS Name: Fedora Update for curl FEDORA-2018-8877b4ccac
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: 🔍

Timelineinfo

03/08/2018 🔍
03/14/2018 +6 days 🔍
03/14/2018 +0 days 🔍
03/14/2018 +0 days 🔍
03/14/2018 +0 days 🔍
03/15/2018 +1 days 🔍
04/18/2018 +34 days 🔍
05/02/2018 +14 days 🔍
02/21/2023 +1756 days 🔍

Sourcesinfo

Advisory: RHSA-2018:3157
Researcher: Duy Phan Thanh.
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-1000120 (🔍)
GCVE (CVE): GCVE-0-2018-1000120
GCVE (VulDB): GCVE-100-114580

OVAL: 🔍

SecurityFocus: 103414 - cURL/libcURL CVE-2018-1000120 Buffer Overflow Vulnerability
SecurityTracker: 1040531

See also: 🔍

Entryinfo

Created: 03/15/2018 07:41
Updated: 02/21/2023 19:32
Changes: 03/15/2018 07:41 (74), 01/13/2020 15:59 (6), 02/05/2021 09:17 (2), 02/05/2021 09:21 (1), 02/21/2023 19:32 (3)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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