9.8

CVE-2021-44143: debian debian_linux Out-of-bounds Write

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2021-44143DEBIAN-CVE-2021-44143
Published 22-11-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-44143 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in debian debian_linux. EPSS estimates a 3.78% chance of exploitation in the next 30 days, higher than 89.8% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
3.78%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2024:11779-1

Timeline

  1. 22-11-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

A flaw was found in mbsync in isync 1.4.0 through 1.4.3. Due to an unchecked condition, a malicious or compromised IMAP server could use a crafted mail message that lacks headers (i.e., one that starts with an empty line) to provoke a heap overflow, which could conceivably be exploited for remote code execution.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

3.78%

Chance of exploitation in the next 30 days

Percentile

90%

Versus all other CVEs

30-day change

0.00 pp

From 3.78% on 20-09-2026

20-09-202620-10-2026
EPSS score
3.78%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian2 products
Fedoraproject1 product
Isync_project1 product
  • isync≥ 1.4.0, ≤ 1.4.3
Ubuntu1 product
  • isyncAll versions (No fix recorded)

4 vendors · 5 products

References

10 links