UPX File p_tmt.cpp PackTmt::pack heap-based overflow

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.
4.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in UPX. The impacted element is the function PackTmt::pack of the file p_tmt.cpp of the component File Handler. Such manipulation leads to heap-based overflow. This vulnerability is uniquely identified as CVE-2023-23456. No exploit exists. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in UPX (affected version not known) and classified as problematic. Affected by this issue is the function PackTmt::pack of the file p_tmt.cpp of the component File Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is availability. CVE summarizes:

A heap-based buffer overflow issue was discovered in UPX in PackTmt::pack() in p_tmt.cpp file. The flow allows an attacker to cause a denial of service (abort) via a crafted file.

The weakness was disclosed 01/12/2023 as 632. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2023-23456 since 01/12/2023. There are known technical details, but no exploit is available.

Applying the patch 510505a85cbe45e51fbd470f1aa8b02157c429d4 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-27556). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 5.3
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 510505a85cbe45e51fbd470f1aa8b02157c429d4

Timelineinfo

01/12/2023 🔍
01/12/2023 +0 days 🔍
01/12/2023 +0 days 🔍
10/07/2025 +999 days 🔍

Sourcesinfo

Product: github.com

Advisory: 632
Status: Confirmed

CVE: CVE-2023-23456 (🔍)
GCVE (CVE): GCVE-0-2023-23456
GCVE (VulDB): GCVE-100-218192
EUVD: 🔍

Entryinfo

Created: 01/12/2023 22:35
Updated: 10/07/2025 17:47
Changes: 01/12/2023 22:35 (42), 02/05/2023 11:08 (11), 12/12/2024 02:30 (27), 10/07/2025 17:47 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!