var-201801-0027
Vulnerability from variot
sshd in OpenSSH before 7.4 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via an out-of-sequence NEWKEYS message, as demonstrated by Honggfuzz, related to kex.c and packet.c. Pillow is a Python-based image processing library. There is currently no information about this vulnerability, please feel free to follow CNNVD or manufacturer announcements. OpenSSH is prone to multiple denial-of-service vulnerabilities. An attacker can leverage these issues to crash the affected application, denying service to legitimate users. Versions prior to OpenSSH 7.4 are vulnerable. ========================================================================== Ubuntu Security Notice USN-3809-2 August 12, 2021
openssh regression
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
Summary:
USN-3809-1 introduced a regression in OpenSSH.
Software Description: - openssh: secure shell (SSH) for secure access to remote machines
Details:
USN-3809-1 fixed vulnerabilities in OpenSSH. The update for CVE-2018-15473 was incomplete and could introduce a regression in certain environments. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Robert Swiecki discovered that OpenSSH incorrectly handled certain messages. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-10708) It was discovered that OpenSSH incorrectly handled certain requests. An attacker could possibly use this issue to access sensitive information. (CVE-2018-15473)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04 LTS: openssh-server 1:7.6p1-4ubuntu0.5
In general, a standard system update will make all the necessary changes.
References: https://ubuntu.com/security/notices/USN-3809-2 https://ubuntu.com/security/notices/USN-3809-1 https://launchpad.net/bugs/1934501
Package Information: https://launchpad.net/ubuntu/+source/openssh/1:7.6p1-4ubuntu0.5
Show details on source website{
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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