keepalived up to 2.0.8 lib/html.c memory corruption

Summaryinfo

A vulnerability was found in keepalived up to 2.0.8. It has been classified as critical. Impacted is an unknown function in the library lib/html.c. The manipulation leads to memory corruption. This vulnerability is listed as CVE-2018-19115. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in keepalived up to 2.0.8. It has been rated as critical. This issue affects an unknown code block in the library lib/html.c. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

keepalived through 2.0.8 has a heap-based buffer overflow when parsing HTTP status codes resulting in DoS or possibly unspecified other impact, because extract_status_code in lib/html.c has no validation of the status code and instead writes an unlimited amount of data to the heap.

The bug was discovered 11/09/2018. The weakness was presented 11/08/2018 (Website). The advisory is shared at bugzilla.suse.com. The identification of this vulnerability is CVE-2018-19115 since 11/08/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 119152 (Debian DLA-1589-1 : keepalived 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 197474 (Ubuntu Security Notification for Keepalived Vulnerability (USN-3995-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (119152). See VDB-126589, VDB-126591 and VDB-126590 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• keepalived

Version

• 2.0.0
• 2.0.1
• 2.0.2
• 2.0.3
• 2.0.4
• 2.0.5
• 2.0.6
• 2.0.7
• 2.0.8

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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