Red Hat JBoss Core Services update for Apache HTTP Server

Published: 2020-04-07

Risk	Medium
Patch available	YES
Number of vulnerabilities	8
CVE-ID	CVE-2019-1547 CVE-2019-1549 CVE-2019-1563 CVE-2019-10081 CVE-2019-10082 CVE-2019-10092 CVE-2019-10097 CVE-2019-10098
CWE-ID	CWE-310 CWE-693 CWE-787 CWE-416 CWE-79 CWE-476 CWE-20
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #8 is available.
Vulnerable software Subscribe	jbcs-httpd24-mod_http2 (Red Hat package) Operating systems & Components / Operating system package or component jbcs-httpd24-httpd (Red Hat package) Operating systems & Components / Operating system package or component jbcs-httpd24-brotli (Red Hat package) Operating systems & Components / Operating system package or component jbcs-httpd24-apr (Red Hat package) Operating systems & Components / Operating system package or component JBoss Core Services Server applications / Application servers
Vendor	Red Hat Inc.

Security Bulletin

This security bulletin contains information about 8 vulnerabilities.

1) Cryptographic issues

EUVDB-ID: #VU21043

Risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-1547

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: No

Description

The vulnerability allows a remote attacker to decrypt traffic.

The vulnerability exists due to insufficient enforcement of side channel resistant code paths. A remote attacker with ability to create a large number of signatures, where explicit parameters with no co-factor is present, can force the application to fall back to non-side channel resistant code pathsduring ECDSA signature operation and perform full key recovery.

Successful exploitation of the vulnerability may allow an attacker to decrypt communication between server and client.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

jbcs-httpd24-mod_http2 (Red Hat package): 1.11.3-8.jbcs.el6 - 1.11.3-8.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el6 - 2.4.37-41.jbcs.el7

jbcs-httpd24-brotli (Red Hat package): 1.0.6-7.jbcs.el6 - 1.0.6-9.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el6 - 1.6.3-73.jbcs.el7

JBoss Core Services: All versions

External links

http://access.redhat.com/errata/RHSA-2020:1337

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Protection Mechanism Failure

EUVDB-ID: #VU21044

Risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-1549

CWE-ID: CWE-693 - Protection Mechanism Failure

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to OpenSSL does not use by default a rewritten random number generator (RNG) in the event of a fork() system call, resulting in the child and parent processes share the same RNG state.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

jbcs-httpd24-mod_http2 (Red Hat package): 1.11.3-8.jbcs.el6 - 1.11.3-8.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el6 - 2.4.37-41.jbcs.el7

jbcs-httpd24-brotli (Red Hat package): 1.0.6-7.jbcs.el6 - 1.0.6-9.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el6 - 1.6.3-73.jbcs.el7

JBoss Core Services: All versions

External links

http://access.redhat.com/errata/RHSA-2020:1337

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Padding oracle attack

EUVDB-ID: #VU21045

Risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-1563

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform padding oracle attack.

The vulnerability exists due to possibility to perform a Bleichenbacher padding oracle attack against the RSA key, in situations where an attacker receives automated notification of the success or failure of a decryption attempt an attacker. A remote attacker can send a very large number of messages to be decrypted, can recover a CMS/PKCS7 transported encryption key or decrypt any RSA encrypted message that was encrypted with the public RSA key.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

jbcs-httpd24-mod_http2 (Red Hat package): 1.11.3-8.jbcs.el6 - 1.11.3-8.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el6 - 2.4.37-41.jbcs.el7

jbcs-httpd24-brotli (Red Hat package): 1.0.6-7.jbcs.el6 - 1.0.6-9.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el6 - 1.6.3-73.jbcs.el7

JBoss Core Services: All versions

External links

http://access.redhat.com/errata/RHSA-2020:1337

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Out-of-bounds write

EUVDB-ID: #VU20373

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-10081

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform denial of service attack.

The vulnerability exists due to a boundary error when processing HTTP/2 requests within the mod_http2 module, configured with "H2PushResource". A remote attacker can send specially crafted HTTP/2 requests to the affected server and perform denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

jbcs-httpd24-mod_http2 (Red Hat package): 1.11.3-8.jbcs.el6 - 1.11.3-8.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el6 - 2.4.37-41.jbcs.el7

jbcs-httpd24-brotli (Red Hat package): 1.0.6-7.jbcs.el6 - 1.0.6-9.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el6 - 1.6.3-73.jbcs.el7

JBoss Core Services: All versions

External links

http://access.redhat.com/errata/RHSA-2020:1337

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Use-after-free

EUVDB-ID: #VU20386

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-10082

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error within the mod_http2 when handling connection shutdown. A remote attacker can send specially crafted requests to the affected server and make the mod_http2 to read memory that was already freed.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

jbcs-httpd24-mod_http2 (Red Hat package): 1.11.3-8.jbcs.el6 - 1.11.3-8.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el6 - 2.4.37-41.jbcs.el7

jbcs-httpd24-brotli (Red Hat package): 1.0.6-7.jbcs.el6 - 1.0.6-9.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el6 - 1.6.3-73.jbcs.el7

JBoss Core Services: All versions

External links

http://access.redhat.com/errata/RHSA-2020:1337

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Cross-site scripting

EUVDB-ID: #VU20384

Risk: Low

CVSSv3.1: 4.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-10092

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data on the mod_proxy error page. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

jbcs-httpd24-mod_http2 (Red Hat package): 1.11.3-8.jbcs.el6 - 1.11.3-8.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el6 - 2.4.37-41.jbcs.el7

jbcs-httpd24-brotli (Red Hat package): 1.0.6-7.jbcs.el6 - 1.0.6-9.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el6 - 1.6.3-73.jbcs.el7

JBoss Core Services: All versions

External links

http://access.redhat.com/errata/RHSA-2020:1337

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

7) NULL pointer dereference

EUVDB-ID: #VU20385

Risk: Low

CVSSv3.1: 2.4 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-10097

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error when processing PROXY header within the mod_remoteip. A remote attacker that controls a trusted proxy server can send a specially crafted PROXY header, trigger stack overflow and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

jbcs-httpd24-mod_http2 (Red Hat package): 1.11.3-8.jbcs.el6 - 1.11.3-8.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el6 - 2.4.37-41.jbcs.el7

jbcs-httpd24-brotli (Red Hat package): 1.0.6-7.jbcs.el6 - 1.0.6-9.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el6 - 1.6.3-73.jbcs.el7

JBoss Core Services: All versions

External links

http://access.redhat.com/errata/RHSA-2020:1337

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

8) Input validation error

EUVDB-ID: #VU20374

Risk: Medium

CVSSv3.1: 4.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-10098

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to incorrect handling of encoded line break characters within rewrite rules. A remote attacker can send a specially crafted HTTP request and potentially bypass security restrictions.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

jbcs-httpd24-mod_http2 (Red Hat package): 1.11.3-8.jbcs.el6 - 1.11.3-8.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el6 - 2.4.37-41.jbcs.el7

jbcs-httpd24-brotli (Red Hat package): 1.0.6-7.jbcs.el6 - 1.0.6-9.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el6 - 1.6.3-73.jbcs.el7

JBoss Core Services: All versions

External links

http://access.redhat.com/errata/RHSA-2020:1337

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.