CVE-2018-20615: An out-of-bounds read issue was discovered in the HTTP/2 protocol decoder in HAProxy 1.8.x and 1.9.x through 1.9.0 which can result in a crash

Description

An out-of-bounds read issue was discovered in the HTTP/2 protocol decoder in HAProxy 1.8.x and 1.9.x through 1.9.0 which can result in a crash. The processing of the PRIORITY flag in a HEADERS frame requires 5 extra bytes, and while these bytes are skipped, the total frame length was not re-checked to make sure they were present in the frame.

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

None

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)4.5% · higher than 91% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

EL

Enterprise Linux · Redhat

7.0; 7.4; 7.5; 7.6 · source: NVD

HA

Haproxy · Haproxy

1.8.0 through 1.8.19; 1.9.0; 1.9.0; 1.9.0; 1.9.0; 1.9.0; +8 more · source: NVD

LE

Leap · Opensuse

15.0 · source: NVD

OC

Openshift Container Platform · Redhat

3.11 · source: NVD

UL

Ubuntu Linux · Canonical

16.04; 18.04; 18.10 · source: NVD