Vulnerability in Mozilla Thunderbird
CVE-2021-29948
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.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.5 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (19.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Mozilla Thunderbird — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.mozilla.org/security/advisories/mfsa2021-14/ (Release Notes, Vendor Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Exploit, Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-29948?
- CVE-2021-29948 is a low-severity vulnerability in Mozilla Thunderbird, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 2.5/10. Published 2021-06-24.
- How severe is CVE-2021-29948?
- Low severity. CVSS v3 base score is 2.5 out of 10.
- Is CVE-2021-29948 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.