CVE-2020-27797
CVE-2020-27797 is a medium-severity vulnerability in Upx with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-763.
Key facts
- Severity: Medium (CVSS 3.x base score 5.5)
- EPSS exploit prediction: 0% (19th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-763
- Affected product: Upx
- Published:
- Last modified:
Description
An invalid memory address reference was discovered in the elf_lookup function in p_lx_elf.cpp in UPX 4.0.0 via a crafted Mach-O file.
Frequently asked questions
- What is CVE-2020-27797?
- An invalid memory address reference was discovered in the elf_lookup function in p_lx_elf.cpp in UPX 4.0.0 via a crafted Mach-O file.
- How severe is CVE-2020-27797?
- CVE-2020-27797 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2020-27797 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-27797?
- CVE-2020-27797 affects Upx. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-27797?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2020-27797 published?
- CVE-2020-27797 was published on 2022-08-25 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:upx:upx:4.0.0:*:*:*:*:*:*:*
More vulnerabilities in Upx
- CVE-2020-27801 — High (CVSS 7.8): A heap-based buffer over-read was discovered in the get_le64 function in bele.h in UPX 4.0.0 via a crafted Mach-O file.
- CVE-2020-27800 — High (CVSS 7.8): A heap-based buffer over-read was discovered in the get_le32 function in bele.h in UPX 4.0.0 via a crafted Mach-O file.
- CVE-2020-27799 — High (CVSS 7.8): A heap-based buffer over-read was discovered in the acc_ua_get_be32 function in miniacc.h in UPX 4.0.0 via a crafted…
- CVE-2020-27796 — High (CVSS 7.8): A heap-based buffer over-read was discovered in the invert_pt_dynamic function in p_lx_elf.cpp in UPX 4.0.0 via a…
- CVE-2021-30500 — High (CVSS 7.8): Null pointer dereference was found in upx PackLinuxElf::canUnpack() in p_lx_elf.cpp,in version UPX 4.0.0. That allow…
- CVE-2019-14296 — High (CVSS 7.8): canUnpack in p_vmlinx.cpp in UPX 3.95 allows remote attackers to cause a denial of service (SEGV or buffer overflow,…
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- CVE-2024-44852 — Critical (CVSS 9.8): Open Robotics Robotic Operating System 2 ROS2 navigation2 v.humble was discovered to contain a segmentation violation…
- CVE-2021-42377 — Critical (CVSS 9.8): An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution…
- CVE-2021-30473 — Critical (CVSS 9.8): aom_image.c in libaom in AOMedia before 2021-04-07 frees memory that is not located on the heap.
- CVE-2021-24028 — Critical (CVSS 9.8): An invalid free in Thrift's table-based serialization can cause the application to crash or potentially result in code…