2.5

CVE-2021-29948: mozilla thunderbird Race Condition

CVSS: 2.5v3.1LowModified
AliasesUBUNTU-CVE-2021-29948DEBIAN-CVE-2021-29948
Published 24-06-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-29948 is a low (CVSS 2.5) Race Condition vulnerability in mozilla thunderbird. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 19.7% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
20/100
0100
Low · default modelHow is this calculated?
CVSS score
2.5/10
010
Low · v3.1 (NVD)
EPSS score
0.29%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 12 · Related 5
DLA-2632-1DSA-4897-1MGASA-2021-0198OPENSUSE-SU-2021:0644-1OPENSUSE-SU-2024:10601-1RHSA-2021:1350

Timeline

  1. 24-06-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

Signatures are written to disk before and read during verification, which might be subject to a race condition when a malicious local process or user is replacing the file. This vulnerability affects Thunderbird < 78.10.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

0.00 pp

From 0.29% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.29%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (bugzilla.mozilla.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • thunderbird< 1:78.10.0-1
Mozilla1 product
Ubuntu1 product
  • thunderbird< 1:78.11.0+build1-0ubuntu0.18.04.2 | < 1:78.11.0+build1-0ubuntu0.20.04.2

3 vendors · 3 products

References

9 links