CVE-2019-20021: fedoraproject fedora Out-of-bounds Read
CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2019-20021DEBIAN-CVE-2019-20021
Published 27-12-2019Last modified 05-08-2024
Vulnerability summary
CVE-2019-20021 is a medium (CVSS 5.5) Out-of-bounds Read vulnerability in fedoraproject fedora. EPSS estimates a 1.09% chance of exploitation in the next 30 days, higher than 65.1% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
5.5/10
010
Medium · v3.1 (NVD)EPSS score
1.09%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Advisory lineage
Upstream 0 · Downstream 4 · Related 3Timeline
- 27-12-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
A heap-based buffer over-read was discovered in canUnpack in p_mach.cpp in UPX 3.95 via a crafted Mach-O file.
CVSS metrics
4 scores · 3 sources · 2 versionsMedium 5.5Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.09%
Chance of exploitation in the next 30 days
Percentile
65%
Versus all other CVEs
30-day change
0.00 pp
From 1.09% on 21-09-2026
21-09-202621-10-2026
EPSS score1.09%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundUpx
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Debian1 product
- upx-ucl< 3.96-1
Fedoraproject1 product
- fedoraEOL30 | 31
Ubuntu1 product
- upx-uclAll versions (No fix recorded)
Upx1 product
- upx3.95
4 vendors · 4 products
References
9 links- lists.opensuse.org/opensuse-security-announce/2020-02/msg00003.htmlVendor AdvisoryX Refsource SUSEBroken Link
- lists.opensuse.org/opensuse-security-announce/2020-02/msg00007.htmlVendor AdvisoryX Refsource SUSEBroken Link
