CVE-2017-7805
Published: 29 September 2017
During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer. This saved data is used for later messages but in some cases, the handshake transcript can exceed the space available in the current buffer, causing the allocation of a new buffer. This leaves a pointer pointing to the old, freed buffer, resulting in a use-after-free when handshake hashes are then calculated afterwards. This can result in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.
Priority
Status
Package | Release | Status |
---|---|---|
firefox Launchpad, Ubuntu, Debian |
artful |
Released
(56.0+build6-0ubuntu1)
|
bionic |
Released
(56.0+build6-0ubuntu1)
|
|
cosmic |
Released
(56.0+build6-0ubuntu1)
|
|
trusty |
Released
(56.0+build6-0ubuntu0.14.04.1)
|
|
upstream |
Released
(56.0)
|
|
xenial |
Released
(56.0+build6-0ubuntu0.16.04.1)
|
|
zesty |
Released
(56.0+build6-0ubuntu0.17.04.1)
|
|
nss Launchpad, Ubuntu, Debian |
artful |
Released
(2:3.32-1ubuntu3)
|
bionic |
Released
(2:3.32-1ubuntu3)
|
|
cosmic |
Released
(2:3.32-1ubuntu3)
|
|
trusty |
Released
(2:3.28.4-0ubuntu0.14.04.3)
|
|
upstream |
Needs triage
|
|
xenial |
Released
(2:3.28.4-0ubuntu0.16.04.3)
|
|
zesty |
Released
(2:3.28.4-0ubuntu0.17.04.3)
|
|
Patches: upstream: https://hg.mozilla.org/projects/nss/rev/839200ce0943166a079284bdf45dcc37bb672925 |
||
thunderbird Launchpad, Ubuntu, Debian |
artful |
Released
(1:52.4.0+build1-0ubuntu2)
|
bionic |
Released
(1:52.4.0+build1-0ubuntu2)
|
|
cosmic |
Released
(1:52.4.0+build1-0ubuntu2)
|
|
trusty |
Released
(1:52.4.0+build1-0ubuntu0.14.04.2)
|
|
upstream |
Released
(52.4.0)
|
|
xenial |
Released
(1:52.4.0+build1-0ubuntu0.16.04.2)
|
|
zesty |
Released
(1:52.4.0+build1-0ubuntu0.17.04.2)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
- https://www.mozilla.org/en-US/security/advisories/mfsa2017-22/
- https://www.mozilla.org/en-US/security/advisories/mfsa2017-21/
- https://ubuntu.com/security/notices/USN-3431-1
- https://ubuntu.com/security/notices/USN-3435-1
- https://ubuntu.com/security/notices/USN-3436-1
- https://www.cve.org/CVERecord?id=CVE-2017-7805
- NVD
- Launchpad
- Debian