CVE-2019-18676
Published: 26 November 2019
An issue was discovered in Squid 3.x and 4.x through 4.8. Due to incorrect input validation, there is a heap-based buffer overflow that can result in Denial of Service to all clients using the proxy. Severity is high due to this vulnerability occurring before normal security checks; any remote client that can reach the proxy port can trivially perform the attack via a crafted URI scheme.
Notes
Author | Note |
---|---|
mdeslaur | same fix as CVE-2019-12523 This was fixed in 4.x by rewriting the URI parser to use SBuf. fixed in Debian's 3.5.23-5+deb9u2 |
Priority
Status
Package | Release | Status |
---|---|---|
squid Launchpad, Ubuntu, Debian |
groovy |
Released
(4.9-2ubuntu1)
|
hirsute |
Released
(4.9-2ubuntu1)
|
|
bionic |
Does not exist
|
|
disco |
Released
(4.4-1ubuntu2.3)
|
|
eoan |
Released
(4.8-1ubuntu2.1)
|
|
focal |
Released
(4.9-2ubuntu1)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.9-1)
|
|
xenial |
Does not exist
|
|
Patches: upstream: http://www.squid-cache.org/Versions/v4/changesets/squid-4-fbbdf75efd7a5cc244b4886a9d42ea458c5a3a73.patch |
||
squid3 Launchpad, Ubuntu, Debian |
hirsute |
Does not exist
|
bionic |
Released
(3.5.27-1ubuntu1.7)
|
|
disco |
Does not exist
|
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Released
(3.5.12-1ubuntu7.12)
|
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |