Debian devscripts up to 2.18.3 scripts/grep-excuses.pl YAML::Syck code injection

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

A vulnerability classified as critical has been found in Debian devscripts up to 2.18.3. This affects the function YAML::Syck of the file scripts/grep-excuses.pl. The manipulation with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

scripts/grep-excuses.pl in Debian devscripts through 2.18.3 allows code execution through unsafe YAML loading because YAML::Syck is used without a configuration that prevents unintended blessing.

The bug was discovered 10/01/2018. The weakness was shared 07/01/2018 (Website). It is possible to read the advisory at bugs.debian.org. This vulnerability is uniquely identified as CVE-2018-13043 since 07/01/2018. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 110941 (Ubuntu 17.10 / 18.04 LTS : devscripts vulnerability (USN-3704-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197192 (Ubuntu Security Notification for Devscripts Vulnerability (USN-3704-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 days after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (110941).

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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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

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Exploitinginfo

Class: Code injection
CWE: CWE-94 / CWE-74 / CWE-707
ATT&CK: T1059

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

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Current Price Estimation: 🔍

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Nessus ID: 110941
Nessus Name: Ubuntu 17.10 / 18.04 LTS : devscripts vulnerability (USN-3704-1)
Nessus File: 🔍
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Qualys Name: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
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Timelineinfo

07/01/2018 🔍
07/01/2018 +0 days 🔍
07/01/2018 +0 days 🔍
07/03/2018 +2 days 🔍
07/05/2018 +2 days 🔍
07/06/2018 +1 days 🔍
10/01/2018 +87 days 🔍
03/29/2023 +1640 days 🔍

Sourcesinfo

Vendor: debian.org

Advisory: USN-3704-1
Status: Not defined

CVE: CVE-2018-13043 (🔍)

Entryinfo

Created: 07/03/2018 08:41
Updated: 03/29/2023 16:00
Changes: 07/03/2018 08:41 (70), 02/23/2020 17:53 (3), 03/29/2023 16:00 (4)
Complete: 🔍

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