Vulnerability · Published Jan 12, 2023 · Assigned by fedora
CVE-2023-23457Upx: segv on packlinuxelf64::invert_pt_dynamic() in p_lx_elf.cpp
Medium 5.3
In plain English
A medium-severity memory corruption in upx. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.4%top 70.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A Segmentation fault was found in UPX in PackLinuxElf64::invert_pt_dynamic() in p_lx_elf.cpp. An attacker with a crafted input file allows invalid memory address access that could lead to a denial of service.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | upx | 4.0.2-r0 | ALPINE-CVE-2023-23457 |
| Alpine:v3.21 | upx | 4.0.2-r0 | ALPINE-CVE-2023-23457 |
| Alpine:v3.22 | upx | 4.0.2-r0 | ALPINE-CVE-2023-23457 |
| Alpine:v3.23 | upx | 4.0.2-r0 | ALPINE-CVE-2023-23457 |
| Alpine:v3.24 | upx | 4.0.2-r0 | ALPINE-CVE-2023-23457 |
| Debian:13 | upx-ucl | 4.2.2-1 | DEBIAN-CVE-2023-23457 |
| Debian:14 | upx-ucl | 4.2.2-1 | DEBIAN-CVE-2023-23457 |
| Ubuntu:22.04:LTS | upx-ucl | no fix listed | UBUNTU-CVE-2023-23457 |
| Ubuntu:24.04:LTS | upx-ucl | no fix listed | UBUNTU-CVE-2023-23457 |
| Ubuntu:25.10 | upx-ucl | no fix listed | UBUNTU-CVE-2023-23457 |
| Ubuntu:26.04:LTS | upx-ucl | no fix listed | UBUNTU-CVE-2023-23457 |
| Ubuntu:26.10 | upx-ucl | no fix listed | UBUNTU-CVE-2023-23457 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| upx | see references |
Weakness: CWE-119 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L