rssh up to 2.3.4 rsync Argument input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.5$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in rssh up to 2.3.4. Affected by this issue is some unknown functionality of the component rsync Handler. This manipulation as part of Argument causes input validation. This vulnerability is registered as CVE-2019-3463. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in rssh up to 2.3.4. It has been declared as critical. Affected by this vulnerability is some unknown functionality of the component rsync Handler. The manipulation as part of a Argument leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Insufficient sanitization of arguments passed to rsync can bypass the restrictions imposed by rssh, a restricted shell that should restrict users to perform only rsync operations, resulting in the execution of arbitrary shell commands.

The bug was discovered 02/05/2019. The weakness was published 02/06/2019 (Website). It is possible to read the advisory at tracker.debian.org. This vulnerability is known as CVE-2019-3463 since 12/31/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

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 commercial vulnerability scanner Qualys is able to test this issue with plugin 176577 (Debian Security Update for rssh (DSA 4382-1)).

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 106839†). Similar entries are available at VDB-130473 and VDB-130616. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

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

NVD Base Score: 9.8
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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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/31/2018 🔍
02/02/2019 +33 days 🔍
02/05/2019 +3 days 🔍
02/06/2019 +1 days 🔍
02/07/2019 +1 days 🔍
07/06/2023 +1610 days 🔍

Sourcesinfo

Advisory: USN-3946-1
Status: Confirmed

CVE: CVE-2019-3463 (🔍)
GCVE (CVE): GCVE-0-2019-3463
GCVE (VulDB): GCVE-100-130615
SecurityFocus: 106839 - rssh Multiple Remote Command Execution Vulnerabilities

See also: 🔍

Entryinfo

Created: 02/07/2019 09:27
Updated: 07/06/2023 15:11
Changes: 02/07/2019 09:27 (60), 05/08/2020 20:56 (3), 07/06/2023 15:11 (3)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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