GNU C Library 2.38 Call Graph Monitor gmon.c __monstartup buffer overflow ⚔ [Disputed]

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.
6.2	$0-$5k	0.03

Overview

A vulnerability was found in GNU C Library 2.38. It has been declared as problematic. This vulnerability affects the function __monstartup of the file gmon.c of the component Call Graph Monitor. The manipulation leads to buffer overflow. Using CWE to declare the problem leads to CWE-120. The weakness was released 02/06/2023 by Leo Yuriev as Bug 29444 as Bug Report. The advisory is available at sourceware.org. This vulnerability was named CVE-2023-0687. An attack has to be approached locally. Technical details are available. There is no exploit available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment. It is declared as not defined. As 0-day the estimated underground price was around $0-$5k. The real existence of this vulnerability is still doubted at the moment. The inputs that induce this vulnerability are basically addresses of the running application that is built with gmon enabled. It's basically trusted input or input that needs an actual security flaw to be compromised or controlled. The bugfix is ready for download at patchwork.sourceware.org. It is recommended to apply a patch to fix this issue. A possible mitigation has been published even before and not after the disclosure of the vulnerability. [Details]

IOB - Indicator of Behavior (387)

Timeline

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Lang

en	346
zh	26
ja	14
pl	2

Country

us	104
gb	64
cn	42
ie	24
de	16

Actors

QakBot	1
IcedID	1

Activities

IOC - Indicator of Compromise (8)

These indicators of compromise highlight associated network ranges which are known to be part of research and attack activities.

ID	IP range	Actor	Type	Confidence
1	5.161.217.0/24	Alien	predictive	High
2	XX.XXX.XXX.X/XX	Xxxxxxxx	predictive	High
3	XX.XXX.XXX.X/XX	Xxxxxx Xxxxxx	predictive	High
4	XX.XXX.XX.X/XX	Xxxxxx	predictive	High
5	XX.XXX.XXX.X/XX	Xxxxxxx Xxxxxxx	predictive	High
6	XXX.XXX.X.X/XX	Xxxxxx	predictive	High
7	XXX.XXX.XXX.X/XX	Xxxx	predictive	High
8	XXX.XX.XXX.X/XX	Xxxxxx	predictive	High

IOA - Indicator of Attack (1)

These indicators of attack list the potential fragments used for technical activities like reconnaissance, exploitation, privilege escalation, and exfiltration. This data is unique as it uses our predictive model for actor profiling.

ID	Class	Indicator	Type	Confidence
1	File	xxxx.x	predictive	Low

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