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ubuntucveUbuntu.comUB:CVE-2020-17527
HistoryDec 03, 2020 - 12:00 a.m.

CVE-2020-17527

2020-12-0300:00:00
ubuntu.com
ubuntu.com
15

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

5 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:N/A:N

0.003 Low

EPSS

Percentile

69.6%

While investigating bug 64830 it was discovered that Apache Tomcat
10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use
an HTTP request header value from the previous stream received on an HTTP/2
connection for the request associated with the subsequent stream. While
this would most likely lead to an error and the closure of the HTTP/2
connection, it is possible that information could leak between requests.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchtomcat8< anyUNKNOWN
ubuntu18.04noarchtomcat9< 9.0.16-3ubuntu0.18.04.2UNKNOWN
ubuntu20.04noarchtomcat9< 9.0.31-1ubuntu0.2UNKNOWN

References

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

5 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:N/A:N

0.003 Low

EPSS

Percentile

69.6%