GNU wget up to 1.19.1 HTTP Header url.c url_parse crlf injection

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in GNU wget up to 1.19.1. This impacts the function url_parse of the file url.c of the component HTTP Header Handler. This manipulation causes crlf injection. The identification of this vulnerability is CVE-2017-6508. It is possible to initiate the attack remotely. There is no exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability classified as critical was found in GNU wget up to 1.19.1 (Automation Software). Affected by this vulnerability is the function url_parse of the file url.c of the component HTTP Header Handler. The manipulation with an unknown input leads to a crlf injection vulnerability. The CWE definition for the vulnerability is CWE-93. The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

CRLF injection vulnerability in the url_parse function in url.c in Wget through 1.19.1 allows remote attackers to inject arbitrary HTTP headers via CRLF sequences in the host subcomponent of a URL.

The bug was discovered 03/06/2017. The weakness was shared 03/07/2017 as confirmed git commit (GIT Repository). It is possible to read the advisory at git.savannah.gnu.org. This vulnerability is known as CVE-2017-6508 since 03/07/2017. 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 vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 97642 (Debian DLA-851-1 : wget security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196956 (Ubuntu Security Notification for Wget Vulnerabilities (USN-3464-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.savannah.gnu.org. A possible mitigation has been published 2 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (97642) and SecurityFocus (BID 96877†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

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

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Crlf injection
CWE: CWE-93 / CWE-74 / CWE-707
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: 97642
Nessus Name: Debian DLA-851-1 : wget security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for wget FEDORA-2017-ed1c665a3f
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: git.savannah.gnu.org

Timelineinfo

03/06/2017 🔍
03/07/2017 +1 days 🔍
03/07/2017 +0 days 🔍
03/07/2017 +0 days 🔍
03/07/2017 +0 days 🔍
03/07/2017 +0 days 🔍
03/09/2017 +1 days 🔍
03/10/2017 +1 days 🔍
03/15/2017 +5 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: git.savannah.gnu.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-6508 (🔍)
GCVE (CVE): GCVE-0-2017-6508
GCVE (VulDB): GCVE-100-97579
SecurityFocus: 96877 - GNU Wget CVE-2017-6508 CRLF Injection Vulnerability
OSVDB: - CVE-2017-6508 - Wget - CRLF Injection Issue

Entryinfo

Created: 03/07/2017 13:38
Changes: 03/07/2017 13:38 (86)
Complete: 🔍
Cache ID: 216:359:103

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