CVE-2020-6831
published 2020-05-26CVE-2020-6831: A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC. This could have led to memory corruption and a potentially exploitable crash…
PriorityP345critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
5.80%
92.2th percentile
A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
Affected
36 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| chromium | chromium | >= 0 < 83.0.4103.83-1 | 83.0.4103.83-1 |
| chromium | chromium | >= 0 < 83.0.4103.83-1 | 83.0.4103.83-1 |
| chromium | chromium | >= 0 < 83.0.4103.83-1 | 83.0.4103.83-1 |
| chromium | chromium | >= 0 < 83.0.4103.83-1 | 83.0.4103.83-1 |
| debian | chromium | < chromium 83.0.4103.83-1 (bookworm) | chromium 83.0.4103.83-1 (bookworm) |
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | firefox | < chromium 83.0.4103.83-1 (bookworm) | chromium 83.0.4103.83-1 (bookworm) |
| debian | firefox-esr | < chromium 83.0.4103.83-1 (bookworm) | chromium 83.0.4103.83-1 (bookworm) |
| debian | thunderbird | < chromium 83.0.4103.83-1 (bookworm) | chromium 83.0.4103.83-1 (bookworm) |
| chrome_chrome | — | — | |
| 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 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
osv9.8CRITICAL
vendor_debian9.8CRITICAL
vendor_redhat9.8CRITICAL
vendor_ubuntu8.1HIGH
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GHSA
GHSA-5x26-44w7-97vc: A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC
ghsa_unreviewed·2022-05-24
CVE-2020-6831 [HIGH] CWE-120 GHSA-5x26-44w7-97vc: A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC
A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
Project0
Exploiting Android Messengers with WebRTC: Part 2 - Project Zero
project_zero·2020-08-01·CVSS 9.8
CVE-2020-6514 [CRITICAL] Exploiting Android Messengers with WebRTC: Part 2 - Project Zero
##
Posted by Natalie Silvanovich, Project Zero
This is a three-part series on exploiting messenger applications using vulnerabilities in WebRTC. This series highlights what can go wrong when applications don't apply WebRTC patches and when the communication and notification of security issues breaks down. Part 3 is scheduled for August 6.
##
Part 2: A Better Bug
In Part 1, I explored whether it was possible to exploit WebRTC using two memory corruption bugs in RTP processing. While I succeeded at moving the instruction pointer, I was not able to break ASLR, so I decided to look for vulnerabilities more suitable for this purpose.
##
usrsctp
I started off by going through WebRTC bugs I had filed in the past to see if any had the potential to break ASLR. Even if a bug was fixed long
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-2020-6831: A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC
osv·2020-05-26·CVSS 9.8
CVE-2020-6831 [CRITICAL] CVE-2020-6831: A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC
A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC. This could have led to memory corruption and 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)
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
Chrome
Stable Channel Update for Desktop: CVE-2020-6831
vendor_chrome·2020-05-05·CVSS 8.8
CVE-2020-6831 [HIGH] Stable Channel Update for Desktop: CVE-2020-6831
Stable Channel Update for Desktop
CVE-2020-6831: Stack buffer overflow in SCTP. Reported by Natalie Silvanovich of Google Project Zero on 2020-04-22
[$7500][ 1071059 ] High CVE-2020-6464: Type Confusion in Blink
Reported by Looben Yang on 2020-04-15
Severity: high
Red Hat
usrsctp: Buffer overflow in AUTH chunk input validation
vendor_redhat·2020-05-05·CVSS 9.8
CVE-2020-6831 [CRITICAL] CWE-120 usrsctp: Buffer overflow in AUTH chunk input validation
usrsctp: Buffer overflow in AUTH chunk input validation
A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC. This could have led to memory corruption and 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 parsing and validating SCTP chunks in WebRTC a memory buffer overflow could occur leading to memory corruption and 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-2020-6831: chromium - A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC....
vendor_debian·2020·CVSS 9.8
CVE-2020-6831 [CRITICAL] CVE-2020-6831: chromium - A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC....
A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
Scope: local
bookworm: resolved (fixed in 83.0.4103.83-1)
bullseye: resolved (fixed in 83.0.4103.83-1)
forky: resolved (fixed in 83.0.4103.83-1)
sid: resolved (fixed in 83.0.4103.83-1)
trixie: resolved (fixed in 83.0.4103.83-1)
Mozilla
Mozilla Foundation Security Advisory 2020-17: CVE-2020-6831
vendor_mozilla·CVSS 9.8
CVE-2020-6831 [CRITICAL] Mozilla Foundation Security Advisory 2020-17: CVE-2020-6831
Mozilla Foundation Security Advisory 2020-17
CVE: CVE-2020-6831
Product: Firefox ESR
Impact: critical
Fixed in: Firefox ESR 68.8
Mozilla
Mozilla Foundation Security Advisory 2020-16: CVE-2020-6831
vendor_mozilla·CVSS 9.8
CVE-2020-6831 [CRITICAL] Mozilla Foundation Security Advisory 2020-16: CVE-2020-6831
Mozilla Foundation Security Advisory 2020-16
CVE: CVE-2020-6831
Product: Firefox
Impact: high
Fixed in: Firefox 76
Mozilla
Mozilla Foundation Security Advisory 2020-18: CVE-2020-6831
vendor_mozilla·CVSS 9.8
CVE-2020-6831 [CRITICAL] Mozilla Foundation Security Advisory 2020-18: CVE-2020-6831
Mozilla Foundation Security Advisory 2020-18
CVE: CVE-2020-6831
Product: Thunderbird
Impact: critical
Fixed in: Thunderbird 68.8
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-6831 usrsctp: Buffer overflow in AUTH chunk input validation
bugzilla·2020-05-05·CVSS 9.8
CVE-2020-6831 [CRITICAL] CVE-2020-6831 usrsctp: Buffer overflow in AUTH chunk input validation
CVE-2020-6831 usrsctp: Buffer overflow in AUTH chunk input validation
A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC. This could have led to memory corruption and a potentially exploitable crash.
External Reference:
https://www.mozilla.org/en-US/security/advisories/mfsa2020-17/#CVE-2020-6831
Discussion:
Acknowledgments:
Name: the Mozilla project
Upstream: Natalie Silvanovich (Google Project Zero)
---
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/er
Bugzilla
Buffer overflow in sctp chunk input validation
bugzilla·2020-04-22
Buffer overflow in sctp chunk input validation
Buffer overflow in sctp chunk input validation
Upstream usrsctp has been notified about a buffer overflow in their implementation.
The patch for it is available upstream here https://github.com/sctplab/usrsctp/commit/e1dd9bea4f438abf4d4c3b658f1db8f013157184
Alternatively we could work around the problematic code path by disabling SCTP authentication with the following (as that feature isn't used in webrtc any way):
usrsctp_sysctl_set_sctp_asconf_enable(0);
usrsctp_sysctl_set_sctp_auth_enable(0);
Discussion:
Created attachment 9142549
Bug 1632241: add SCTP auth token boundary check
---
Created attachment 9142556
Bug 1632241: turn off SCTP auth and address reconfiguration
Depends on D72053
---
Public commit doesn't literally say "SECURITY BUG!" but it does thank a prominent member
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00000.htmlhttp://packetstormsecurity.com/files/158480/usrsctp-Stack-Buffer-Overflow.htmlhttps://bugzilla.mozilla.org/show_bug.cgi?id=1632241https://security.gentoo.org/glsa/202005-03https://security.gentoo.org/glsa/202005-04https://usn.ubuntu.com/4373-1/https://www.debian.org/security/2020/dsa-4714https://www.mozilla.org/security/advisories/mfsa2020-16/https://www.mozilla.org/security/advisories/mfsa2020-17/https://www.mozilla.org/security/advisories/mfsa2020-18/http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00000.htmlhttp://packetstormsecurity.com/files/158480/usrsctp-Stack-Buffer-Overflow.htmlhttps://bugzilla.mozilla.org/show_bug.cgi?id=1632241https://security.gentoo.org/glsa/202005-03https://security.gentoo.org/glsa/202005-04https://usn.ubuntu.com/4373-1/https://www.debian.org/security/2020/dsa-4714https://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