vulnerability
Ubuntu: USN-3362-1 (CVE-2017-2624): X.Org X server vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 2 | (AV:L/AC:M/Au:N/C:P/I:N/A:N) | Jun 19, 2017 | Jul 24, 2017 | Nov 27, 2024 |
Severity
2
CVSS
(AV:L/AC:M/Au:N/C:P/I:N/A:N)
Published
Jun 19, 2017
Added
Jul 24, 2017
Modified
Nov 27, 2024
Description
It was found that xorg-x11-server before 1.19.0 including uses memcmp() to check the received MIT cookie against a series of valid cookies. If the cookie is correct, it is allowed to attach to the Xorg session. Since most memcmp() implementations return after an invalid byte is seen, this causes a time difference between a valid and invalid byte, which could allow an efficient brute force attack.
Solution(s)
ubuntu-upgrade-xserver-xorg-coreubuntu-upgrade-xserver-xorg-core-hwe-16-04ubuntu-upgrade-xserver-xorg-core-lts-xenial
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