VDB-124144 · CVE-2018-11781 · BID 105373

Apache SpamAssassin 3.4.2 Meta Rule Syntax code injection

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

A vulnerability was found in Apache SpamAssassin 3.4.2 (Anti-Spam Software). It has been declared as problematic. This vulnerability affects some unknown processing of the component Meta Rule Syntax Handler. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Apache SpamAssassin 3.4.2 fixes a local user code injection in the meta rule syntax.

The bug was discovered 09/16/2018. The weakness was shared 09/17/2018 by Security Team with cPanel (Website). The advisory is shared for download at lists.apache.org. This vulnerability was named CVE-2018-11781 since 06/05/2018. The attack needs to be approached locally. Required for exploitation is a single authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.

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 117840 (Fedora 27 : spamassassin (2018-6ed251c42b)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157821 (Oracle Enterprise Linux Security Update for spamassassin (ELSA-2018-2916)).

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

The vulnerability is also documented in the vulnerability database at Tenable (117840). The entries 124134 and 124143 are related to this item.

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
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CVSSv2info

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Exploitinginfo

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

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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Nessus ID: 117840
Nessus Name: Fedora 27 : spamassassin (2018-6ed251c42b)
Nessus File: 🔍
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Timelineinfo

06/05/2018 🔍
09/16/2018 +103 days 🔍
09/17/2018 +0 days 🔍
09/17/2018 +0 days 🔍
09/17/2018 +0 days 🔍
09/18/2018 +1 days 🔍
09/29/2018 +11 days 🔍
10/01/2018 +2 days 🔍
05/16/2023 +1688 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: FEDORA-2018-6ed251c42b
Researcher: Security Team
Organization: cPanel
Status: Confirmed

CVE: CVE-2018-11781 (🔍)
SecurityFocus: 105373 - Apache SpamAssassin CVE-2018-11780 Remote Code Execution Vulnerability

See also: 🔍

Entryinfo

Created: 09/18/2018 07:05
Updated: 05/16/2023 15:17
Changes: 09/18/2018 07:05 (75), 03/24/2020 15:18 (7), 05/16/2023 15:11 (4), 05/16/2023 15:17 (1)
Complete: 🔍

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