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archlinuxArchLinuxASA-202012-3
HistoryDec 05, 2020 - 12:00 a.m.

[ASA-202012-3] tomcat9: information disclosure

2020-12-0500:00:00
security.archlinux.org
138

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%

Arch Linux Security Advisory ASA-202012-3

Severity: Medium
Date : 2020-12-05
CVE-ID : CVE-2020-17527
Package : tomcat9
Type : information disclosure
Remote : Yes
Link : https://security.archlinux.org/AVG-1317

Summary

The package tomcat9 before version 9.0.40-1 is vulnerable to
information disclosure.

Resolution

Upgrade to 9.0.40-1.

pacman -Syu โ€œtomcat9>=9.0.40-1โ€

The problem has been fixed upstream in version 9.0.40.

Workaround

None.

Description

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.

Impact

A remote attacker might be able to access sensitive information via
well-timed HTTP/2 requests.

References

https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.40
https://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.60
https://github.com/apache/tomcat/commit/21e3408671aac7e0d7e264e720cac8b1b189eb29
https://github.com/apache/tomcat/commit/d56293f816d6dc9e2b47107f208fa9e95db58c65
https://security.archlinux.org/CVE-2020-17527

OSVersionArchitecturePackageVersionFilename
ArchLinuxanyanytomcat9<ย 9.0.40-1UNKNOWN

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%