CVE-2020-28928: debian debian_linux Out-of-bounds Write
CVSS: 5.5v3.1MediumModified
AliasesALPINE-CVE-2020-28928UBUNTU-CVE-2020-28928DEBIAN-CVE-2020-28928DLA-2474-1
Published 24-11-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-28928 is a medium (CVSS 5.5) Out-of-bounds Write vulnerability in debian debian_linux. EPSS estimates a 0.65% chance of exploitation in the next 30 days, higher than 50.3% of scored vulnerabilities.
CVSS score
5.5/10
010
Medium · v3.1 (NVD)EPSS score
0.65%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 24-11-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
In musl libc through 1.2.1, wcsnrtombs mishandles particular combinations of destination buffer size and source character limit, as demonstrated by an invalid write access (buffer overflow).
CVSS metrics
5 scores · 4 sources · 2 versionsMedium 5.5Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Low 2.1Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
0.65%
Chance of exploitation in the next 30 days
Percentile
50%
Versus all other CVEs
30-day change
0.00 pp
From 0.65% on 20-09-2026
20-09-202620-10-2026
EPSS score0.65%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- musl< 1.2.2-1 | < 1.1.16-3+deb9u1
- debian_linuxEOL9.0
Alpine1 product
- musl< 1.1.22-r4 | < 1.1.24-r3 | < 1.1.24-r10 | < 1.2.2_pre2-r0 | < 1.1.20-r6
Fedoraproject1 product
- fedoraEOL33 | 34
Musl-libc1 product
- musl≤ 1.2.1
Oracle1 product
- graalvmEOL20.3.2 | 21.1.0
Ubuntu1 product
- musl< 0.9.15-1ubuntu0.1~esm2 | < 1.1.9-1ubuntu0.1~esm3 | < 1.1.19-1ubuntu0.1~esm1 | < 1.1.24-1ubuntu0.1~esm1
6 vendors · 7 products
References
16 links
lists.debian.org/debian-lts-announce/2020/11/msg00050.htmlMailing ListX Refsource MLISTThird Party Advisory