What is CVE-2020-27800?

CVE-2020-27800 is a high-severity vulnerability in Upx, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2022-08-25.

How severe is CVE-2020-27800?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2020-27800 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Upx

CVE-2020-27800

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.

Vulnerability class: Buffer Overflow

EPSS: 0.003 (23.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Upx — versions 4.0.0
N/a Upx — versions upx 4.0.0-git-87b73e5cfdc1+

Weakness classification (CWE)

Public proof-of-concept exploits

Live-Hack-CVE/CVE-2020-27800

References

secalert@redhat.com (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2020-27800?: CVE-2020-27800 is a high-severity vulnerability in Upx, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2022-08-25.
How severe is CVE-2020-27800?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2020-27800 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.