VDB-117395 · CVE-2018-10773 · Nessus 111474

bibutils up to 6.2 serialno.c addsn null pointer dereference

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in bibutils up to 6.2. It has been classified as problematic. This vulnerability affects the function addsn of the file serialno.c. The manipulation leads to null pointer dereference. This vulnerability is referenced as CVE-2018-10773. Remote exploitation of the attack is possible. Furthermore, an exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in bibutils up to 6.2. It has been rated as problematic. This issue affects the function addsn of the file serialno.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

NULL pointer deference in the addsn function in serialno.c in libbibcore.a in bibutils through 6.2 allows remote attackers to cause a denial of service (application crash), as demonstrated by copac2xml.

The bug was discovered 04/19/2018. The weakness was published 05/07/2018 (Website). It is possible to read the advisory at docs.google.com. The identification of this vulnerability is CVE-2018-10773 since 05/06/2018. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as 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). Similar entries are available at VDB-117396 and VDB-117397. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

bibutils

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept

EPSS Score: 🔍
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Price Prediction: 🔍
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Nessus ID: 111474
Nessus Name: Fedora 27 : bibutils (2018-9ec3061fc8)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

04/19/2018 🔍
05/06/2018 +17 days 🔍
05/07/2018 +0 days 🔍
05/07/2018 +0 days 🔍
05/08/2018 +1 days 🔍
08/01/2018 +85 days 🔍
08/02/2018 +1 days 🔍
02/02/2020 +549 days 🔍