CVE-2023-23456
MEDIUMCVSS 5.5/10EPSS 0.39%
Last modified
CVE-2023-23456 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Upx | Upx | < 2022-11-24 |
| Fedoraproject | Fedora | 36 |
| Fedoraproject | Fedora | 37 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2160381Issue Tracking, Third Party Advisory
- https://github.com/upx/upx/commit/510505a85cbe45e51fbd470f1aa8b02157c429d4Patch, Third Party Advisory
- https://github.com/upx/upx/issues/632Exploit, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2160381Issue Tracking, Third Party Advisory
- https://github.com/upx/upx/commit/510505a85cbe45e51fbd470f1aa8b02157c429d4Patch, Third Party Advisory
- https://github.com/upx/upx/issues/632Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2023-23456?
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.
How severe is CVE-2023-23456?
CVE-2023-23456 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.
How do I fix CVE-2023-23456?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2023-23456?
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Scan your code nowSource: NVD / NIST