bibutils up to 6.2 isiin.c isiin_keyword memory corruption

Summaryinfo

A vulnerability was found in bibutils up to 6.2. It has been declared as problematic. This issue affects the function isiin_keyword of the file isiin.c. The manipulation results in memory corruption. This vulnerability is identified as CVE-2018-10774. The attack can be executed remotely. Additionally, an exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in bibutils up to 6.2. Affected is the function isiin_keyword of the file isiin.c. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

Read access violation in the isiin_keyword function in isiin.c in libbibutils.a in bibutils through 6.2 allows remote attackers to cause a denial of service (application crash), as demonstrated by isi2xml.

The bug was discovered 04/19/2018. The weakness was released 05/07/2018 (Website). The advisory is shared for download at docs.google.com. This vulnerability is traded as CVE-2018-10774 since 05/06/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 18 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 111474 (Fedora 27 : bibutils (2018-9ec3061fc8)), 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 277485 (Fedora Security Update for bibutils (FEDORA-2018-67914db5d9)).

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

The vulnerability is also documented in the vulnerability database at Tenable (111474). Entries connected to this vulnerability are available at VDB-117395 and VDB-117397. Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• bibutils

Version

• 6.0
• 6.1
• 6.2

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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