CVE-2020-12387
published 2020-05-26CVE-2020-12387: A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. This…
PriorityP340high8.1CVSS 3.1
AVNACHPRNUINSUCHIHAH
EPSS
1.40%
69.2th percentile
A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
Affected
23 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 76.0-1 (sid) | firefox 76.0-1 (sid) |
| debian | firefox-esr | < firefox 76.0-1 (sid) | firefox 76.0-1 (sid) |
| debian | thunderbird | < firefox 76.0-1 (sid) | firefox 76.0-1 (sid) |
| mozilla | firefox | < 76.0 | 76.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 0 < 76.0.1+build1-0ubuntu0.16.04.1 | 76.0.1+build1-0ubuntu0.16.04.1 |
| mozilla | firefox | >= 0 < 76.0+build2-0ubuntu0.16.04.1 | 76.0+build2-0ubuntu0.16.04.1 |
| mozilla | firefox | >= 0 < 76.0.1+build1-0ubuntu0.18.04.1 | 76.0.1+build1-0ubuntu0.18.04.1 |
| mozilla | firefox | >= 0 < 76.0+build2-0ubuntu0.18.04.1 | 76.0+build2-0ubuntu0.18.04.1 |
| mozilla | firefox | >= 0 < 76.0.1+build1-0ubuntu0.20.04.1 | 76.0.1+build1-0ubuntu0.20.04.1 |
| mozilla | firefox | >= 0 < 76.0+build2-0ubuntu0.20.04.1 | 76.0+build2-0ubuntu0.20.04.1 |
| mozilla | firefox | >= unspecified < 76 | 76 |
| mozilla | firefox_esr | < 68.8.0 | 68.8.0 |
| mozilla | firefox_esr | >= unspecified < 68.8 | 68.8 |
| mozilla | thunderbird | < 68.8.0 | 68.8.0 |
| mozilla | thunderbird | >= 0 < 1:68.8.0-1 | 1:68.8.0-1 |
| mozilla | thunderbird | >= 0 < 1:68.8.0-1 | 1:68.8.0-1 |
| mozilla | thunderbird | >= 0 < 1:68.8.0-1 | 1:68.8.0-1 |
| mozilla | thunderbird | >= 0 < 1:68.8.0-1 | 1:68.8.0-1 |
| mozilla | thunderbird | >= 0 < 1:68.8.0+build2-0ubuntu0.16.04.2 | 1:68.8.0+build2-0ubuntu0.16.04.2 |
| mozilla | thunderbird | >= 0 < 1:68.8.0+build2-0ubuntu0.18.04.2 | 1:68.8.0+build2-0ubuntu0.18.04.2 |
| mozilla | thunderbird | >= 0 < 1:68.8.0+build2-0ubuntu0.20.04.2 | 1:68.8.0+build2-0ubuntu0.20.04.2 |
| mozilla | thunderbird | >= unspecified < 68.8.0 | 68.8.0 |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
osv8.1HIGH
vendor_debian8.1HIGH
vendor_redhat8.1HIGH
vendor_ubuntu8.1HIGH
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Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2020-05-26·CVSS 8.1
CVE-2020-6831 [HIGH] Thunderbird vulnerabilities
Title: Thunderbird vulnerabilities
Summary: Several security issues were fixed in Thunderbird.
Multiple security issues were discovered in Thunderbird. If a user were
tricked in to opening a specially crafted website in a browsing context,
an attacker could potentially exploit these to cause a denial of service,
or execute arbitrary code. (CVE-2020-6831, CVE-2020-12387, CVE-2020-12395)
It was discovered that the Devtools’ ‘Copy as cURL’ feature did not
properly escape the HTTP POST data of a request. If a user were tricked
in to using the ‘Copy as cURL’ feature to copy and paste a command with
specially crafted data in to a terminal, an attacker could potentially
exploit this to obtain sensitive information from local files.
(CVE-2020-12392)
It was discovered that Thunderbird did not c
Ubuntu
Firefox regression
vendor_ubuntu·2020-05-12·CVSS 8.1
[HIGH] Firefox regression
Title: Firefox regression
Summary: USN-4353-1 caused a regression in Firefox.
USN-4353-1 fixed vulnerabilities in Firefox. The update caused a
regression that impaired the functionality of some addons. This update
fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, bypass security
restrictions, spoof the URL bar, or execute arbitrary code.
(CVE-2020-6831, CVE-2020-12387, CVE-2020-12390, CVE-2020-12391,
CVE-2020-12394, CVE-2020-12395, CVE-2020-12396)
It was discovered that the Devtools’ ‘Copy as cURL’ feature did not
properly HTTP POST data of a request. If a user w
Ubuntu
Firefox vulnerabilities
vendor_ubuntu·2020-05-07·CVSS 8.1
CVE-2020-12387 [HIGH] Firefox vulnerabilities
Title: Firefox vulnerabilities
Summary: Firefox could be made to crash or run programs as your login if it
opened a malicious website.
Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, bypass security
restrictions, spoof the URL bar, or execute arbitrary code.
(CVE-2020-6831, CVE-2020-12387, CVE-2020-12390, CVE-2020-12391,
CVE-2020-12394, CVE-2020-12395, CVE-2020-12396)
It was discovered that the Devtools’ ‘Copy as cURL’ feature did not
properly escape the HTTP POST data of a request. If a user were tricked in to
using the ‘Copy as cURL’ feature to copy and paste a command with
specially crafted data in to a terminal, an attacker could potentiall
Red Hat
Mozilla: Use-after-free during worker shutdown
vendor_redhat·2020-05-05·CVSS 8.1
CVE-2020-12387 [HIGH] CWE-416 Mozilla: Use-after-free during worker shutdown
Mozilla: Use-after-free during worker shutdown
A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
A flaw was found in Mozilla Firefox and Thunderbird. When running shutdown code for Web Worker, a race condition occurs leading to a use-after-free memory flaw that could lead to an exploitable crash. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Package: firefox (Red Hat Enterprise Linux 5) - Out of support scope
Package: thunderbird (Red Hat Enterprise Linux 5) - Out of support scope
Debian
CVE-2020-12387: firefox - A race condition when running shutdown code for Web Worker led to a use-after-fr...
vendor_debian·2020·CVSS 8.1
CVE-2020-12387 [HIGH] CVE-2020-12387: firefox - A race condition when running shutdown code for Web Worker led to a use-after-fr...
A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
Scope: local
sid: resolved (fixed in 76.0-1)
Mozilla
Mozilla Foundation Security Advisory 2020-17: CVE-2020-12387
vendor_mozilla·CVSS 8.1
CVE-2020-12387 [HIGH] Mozilla Foundation Security Advisory 2020-17: CVE-2020-12387
Mozilla Foundation Security Advisory 2020-17
CVE: CVE-2020-12387
Product: Firefox ESR
Impact: critical
Fixed in: Firefox ESR 68.8
Mozilla
Mozilla Foundation Security Advisory 2020-16: CVE-2020-12387
vendor_mozilla·CVSS 8.1
CVE-2020-12387 [HIGH] Mozilla Foundation Security Advisory 2020-16: CVE-2020-12387
Mozilla Foundation Security Advisory 2020-16
CVE: CVE-2020-12387
Product: Firefox
Impact: high
Fixed in: Firefox 76
Mozilla
Mozilla Foundation Security Advisory 2020-18: CVE-2020-12387
vendor_mozilla·CVSS 8.1
CVE-2020-12387 [HIGH] Mozilla Foundation Security Advisory 2020-18: CVE-2020-12387
Mozilla Foundation Security Advisory 2020-18
CVE: CVE-2020-12387
Product: Thunderbird
Impact: critical
Fixed in: Thunderbird 68.8
GHSA
GHSA-8m69-jh8v-xjx3: A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability
ghsa_unreviewed·2022-05-24
CVE-2020-12387 [MEDIUM] CWE-362 GHSA-8m69-jh8v-xjx3: A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability
A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
OSV
thunderbird vulnerabilities
osv·2020-05-26·CVSS 8.1
CVE-2020-6831 [HIGH] thunderbird vulnerabilities
thunderbird vulnerabilities
Multiple security issues were discovered in Thunderbird. If a user were
tricked in to opening a specially crafted website in a browsing context,
an attacker could potentially exploit these to cause a denial of service,
or execute arbitrary code. (CVE-2020-6831, CVE-2020-12387, CVE-2020-12395)
It was discovered that the Devtools’ ‘Copy as cURL’ feature did not
properly escape the HTTP POST data of a request. If a user were tricked
in to using the ‘Copy as cURL’ feature to copy and paste a command with
specially crafted data in to a terminal, an attacker could potentially
exploit this to obtain sensitive information from local files.
(CVE-2020-12392)
It was discovered that Thunderbird did not correctly handle Unicode
whitespace characters within the From email
OSV
CVE-2020-12387: A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability
osv·2020-05-26·CVSS 8.1
CVE-2020-12387 [HIGH] CVE-2020-12387: A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability
A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
OSV
firefox regression
osv·2020-05-12·CVSS 8.1
[HIGH] firefox regression
firefox regression
USN-4353-1 fixed vulnerabilities in Firefox. The update caused a
regression that impaired the functionality of some addons. This update
fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, bypass security
restrictions, spoof the URL bar, or execute arbitrary code.
(CVE-2020-6831, CVE-2020-12387, CVE-2020-12390, CVE-2020-12391,
CVE-2020-12394, CVE-2020-12395, CVE-2020-12396)
It was discovered that the Devtools’ ‘Copy as cURL’ feature did not
properly HTTP POST data of a request. If a user were tricked in to using
the ‘Copy as cURL’ feature to copy a
OSV
firefox vulnerabilities
osv·2020-05-07·CVSS 8.1
CVE-2020-6831 [HIGH] firefox vulnerabilities
firefox vulnerabilities
Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, bypass security
restrictions, spoof the URL bar, or execute arbitrary code.
(CVE-2020-6831, CVE-2020-12387, CVE-2020-12390, CVE-2020-12391,
CVE-2020-12394, CVE-2020-12395, CVE-2020-12396)
It was discovered that the Devtools’ ‘Copy as cURL’ feature did not
properly escape the HTTP POST data of a request. If a user were tricked in to
using the ‘Copy as cURL’ feature to copy and paste a command with
specially crafted data in to a terminal, an attacker could potentially
exploit this to obtain sensitive information from local files.
(CVE-2020-12392)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-12387 Mozilla: Use-after-free during worker shutdown
bugzilla·2020-05-05·CVSS 8.1
CVE-2020-12387 [HIGH] CVE-2020-12387 Mozilla: Use-after-free during worker shutdown
CVE-2020-12387 Mozilla: Use-after-free during worker shutdown
A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash.
External Reference:
https://www.mozilla.org/en-US/security/advisories/mfsa2020-17/#CVE-2020-12387
Discussion:
Acknowledgments:
Name: the Mozilla project
Upstream: Looben Yang
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions
Via RHSA-2020:2033 https://access.redhat.com/errata/RHSA-2020:2033
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 8.1 Extended Update Support
Via RHSA-2020:2032 https://access.redhat.com/errata/RHSA-2020:2032
---
This issue has been ad
Bugzilla
CVE-2019-12387 python-twisted: Improper neutralization of CRLF characters in URIs and HTTP methods
bugzilla·2019-06-12·CVSS 6.1
CVE-2019-12387 [MEDIUM] CVE-2019-12387 python-twisted: Improper neutralization of CRLF characters in URIs and HTTP methods
CVE-2019-12387 python-twisted: Improper neutralization of CRLF characters in URIs and HTTP methods
In Twisted before 19.2.1, twisted.web did not validate or sanitize URIs or HTTP methods, allowing an attacker to inject invalid characters such as CRLF.
Upstream patch:
https://github.com/twisted/twisted/commit/6c61fc4503ae39ab8ecee52d10f10ee2c371d7e2
References:
https://github.com/twisted/twisted/commit/6c61fc4503ae39ab8ecee52d10f10ee2c371d7e2
Discussion:
Created python-twisted tracking bugs for this issue:
Affects: fedora-all [bug 1719503]
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 7
Via RHSA-2020:1091 https://access.redhat.com/errata/RHSA-2020:1091
---
This bug is now closed. Further updates for individual products will be reflected
https://bugzilla.mozilla.org/show_bug.cgi?id=1545345https://security.gentoo.org/glsa/202005-03https://security.gentoo.org/glsa/202005-04https://usn.ubuntu.com/4373-1/https://www.mozilla.org/security/advisories/mfsa2020-16/https://www.mozilla.org/security/advisories/mfsa2020-17/https://www.mozilla.org/security/advisories/mfsa2020-18/https://bugzilla.mozilla.org/show_bug.cgi?id=1545345https://security.gentoo.org/glsa/202005-03https://security.gentoo.org/glsa/202005-04https://usn.ubuntu.com/4373-1/https://www.mozilla.org/security/advisories/mfsa2020-16/https://www.mozilla.org/security/advisories/mfsa2020-17/https://www.mozilla.org/security/advisories/mfsa2020-18/
2020-05-26
Published