CVE-2019-17021
During the initialization of a new content process, a race condition occurs that can allow a content process to disclose heap addresses from the parent process. *Note: this issue only occurs on
02 Description
During the initialization of a new content process, a race condition occurs that can allow a content process to disclose heap addresses from the parent process. *Note: this issue only occurs on
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.86% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 79.1% of scored records. A rank, not a probability.
- NVD base score
- 5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2020-01-08 21:29Z6 YR AGO
- Last updated
- 2024-08-05 01:24Z2 YR AGO
- Reserved
- 2019-09-30
- Assigning CNA
- mozilla
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')Class
- Data version
- 5.1
- Document digest
- fd5987b9fad8e56a09dad33b46338cd8f1efcacb54c0feba1d28f76a9a412b80
05 Affected products
06 References
- bugzilla.mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=1599008
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2020-01/
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2020-02/
- seclists.org20200112 [slackware-security] mozilla-thunderbird (SSA:2020-010-01)https://seclists.org/bugtraq/2020/Jan/18
- packetstormsecurity.comhttp://packetstormsecurity.com/files/155912/Slackware-Security-Advisory-mozilla-thunderbird-Updates.html
- lists.opensuse.orgopenSUSE-SU-2020:0060http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00029.html
- lists.opensuse.orgopenSUSE-SU-2020:0094http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00043.html
07 Fixed in
Ubuntu 18.04 LTS
- mozjs38 No fix yet
- mozjs52 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- mozjs52 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.