Vixie cron up to 3.0 Crontab File resource consumption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Vixie cron up to 3.0. It has been declared as problematic. The impacted element is an unknown function of the component Crontab File Handler. Executing a manipulation can lead to resource consumption. This vulnerability appears as CVE-2019-9705. The attack requires local access. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Vixie cron up to 3.0. It has been declared as problematic. This vulnerability affects some unknown processing of the component Crontab File Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. CVE summarizes:

Vixie Cron before the 3.0pl1-133 Debian package allows local users to cause a denial of service (memory consumption) via a large crontab file because an unlimited number of lines is accepted.

The bug was discovered 03/08/2019. The weakness was presented 03/12/2019 by Florian Weimer (Website). The advisory is available at securityfocus.com. This vulnerability was named CVE-2019-9705 since 03/11/2019. Local access is required to approach this attack. Required for exploitation is a single authentication. The technical details are unknown and an exploit is not available.

The vulnerability was handled as a non-public zero-day exploit for at least 4 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 176701 (Debian Security Update for cron (DLA 1723-1)).

Upgrading to version 3.0pl1-133 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 107373†). See VDB-102225, VDB-131577 and VDB-131579 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Version

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: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
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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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Vixie cron 3.0pl1-133
Patch: salsa.debian.org

Timelineinfo

03/08/2019 🔍
03/08/2019 +0 days 🔍
03/11/2019 +3 days 🔍
03/12/2019 +1 days 🔍
03/12/2019 +0 days 🔍
07/31/2023 +1602 days 🔍

Sourcesinfo

Advisory: DLA 1723-1⛔
Researcher: Florian Weimer
Status: Confirmed

CVE: CVE-2019-9705 (🔍)
GCVE (CVE): GCVE-0-2019-9705
GCVE (VulDB): GCVE-100-131578
SecurityFocus: 107373 - Vixie Cron CVE-2019-9704 Use After Free Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 03/12/2019 07:18
Updated: 07/31/2023 14:43
Changes: 03/12/2019 07:18 (60), 05/15/2020 15:31 (5), 07/31/2023 14:43 (5)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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