Multiple vulnerabilities in Red Hat JBoss Core Services Apache HTTP Server



Published: 2021-11-11 | Updated: 2022-06-03
Risk High
Patch available YES
Number of vulnerabilities 11
CVE-ID CVE-2020-14155
CVE-2021-23840
CVE-2019-20838
CVE-2021-26691
CVE-2020-13950
CVE-2021-30641
CVE-2020-35452
CVE-2021-23841
CVE-2021-3712
CVE-2019-17567
CVE-2021-26690
CWE-ID CWE-190
CWE-20
CWE-125
CWE-476
CWE-121
CWE-264
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		JBoss Core Services
Server applications / Application servers

jbcs-httpd24-mod_security (Red Hat package)
Operating systems & Components / Operating system package or component

jbcs-httpd24-mod_md (Red Hat package)
Operating systems & Components / Operating system package or component

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-openssl-pkcs11 (Red Hat package)
Operating systems & Components / Operating system package or component

jbcs-httpd24-openssl-chil (Red Hat package)
Operating systems & Components / Operating system package or component

jbcs-httpd24-nghttp2 (Red Hat package)
Operating systems & Components / Operating system package or component

jbcs-httpd24-curl (Red Hat package)
Operating systems & Components / Operating system package or component

jbcs-httpd24-apr-util (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

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains information about 11 vulnerabilities.

1) Integer overflow

EUVDB-ID: #VU29488

Risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-14155

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow. A remote attacker can pass a large number after a (?C substring, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

JBoss Core Services: 2.4.37 SP8 - 2.4.37 SP9

jbcs-httpd24-mod_security (Red Hat package): 2.9.2-16.GA.jbcs.el7 - 2.9.2-65.GA.jbcs.el7

jbcs-httpd24-mod_md (Red Hat package): 2.0.8-24.jbcs.el7 - 2.0.8-38.jbcs.el7

jbcs-httpd24-mod_http2 (Red Hat package): 1.15.7-3.jbcs.el7 - 1.15.7-19.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el7 - 2.4.37-76.jbcs.el7

jbcs-httpd24-openssl-pkcs11 (Red Hat package): 0.4.10-7.jbcs.el7 - 0.4.10-20.jbcs.el7

jbcs-httpd24-openssl-chil (Red Hat package): 1.0.0-3.jbcs.el7 - 1.0.0-5.jbcs.el7

jbcs-httpd24-nghttp2 (Red Hat package): 1.39.2-1.jbcs.el7 - 1.39.2-37.jbcs.el7

jbcs-httpd24-curl (Red Hat package): 7.64.1-14.jbcs.el7 - 7.77.0-2.jbcs.el7

jbcs-httpd24-apr-util (Red Hat package): 1.6.1-9.jbcs.el7 - 1.6.1-82.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el7 - 1.6.3-105.jbcs.el7

External links

http://access.redhat.com/errata/RHSA-2021:4614


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) Input validation error

EUVDB-ID: #VU50745

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-2021-23840

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input during EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate calls. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

JBoss Core Services: 2.4.37 SP8 - 2.4.37 SP9

jbcs-httpd24-mod_security (Red Hat package): 2.9.2-16.GA.jbcs.el7 - 2.9.2-65.GA.jbcs.el7

jbcs-httpd24-mod_md (Red Hat package): 2.0.8-24.jbcs.el7 - 2.0.8-38.jbcs.el7

jbcs-httpd24-mod_http2 (Red Hat package): 1.15.7-3.jbcs.el7 - 1.15.7-19.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el7 - 2.4.37-76.jbcs.el7

jbcs-httpd24-openssl-pkcs11 (Red Hat package): 0.4.10-7.jbcs.el7 - 0.4.10-20.jbcs.el7

jbcs-httpd24-openssl-chil (Red Hat package): 1.0.0-3.jbcs.el7 - 1.0.0-5.jbcs.el7

jbcs-httpd24-nghttp2 (Red Hat package): 1.39.2-1.jbcs.el7 - 1.39.2-37.jbcs.el7

jbcs-httpd24-curl (Red Hat package): 7.64.1-14.jbcs.el7 - 7.77.0-2.jbcs.el7

jbcs-httpd24-apr-util (Red Hat package): 1.6.1-9.jbcs.el7 - 1.6.1-82.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el7 - 1.6.3-105.jbcs.el7

External links

http://access.redhat.com/errata/RHSA-2021:4614


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) Out-of-bounds read

EUVDB-ID: #VU30256

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-2019-20838

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

libpcre in PCRE before 8.43 allows a subject buffer over-read in JIT when UTF is disabled, and X or R has more than one fixed quantifier, a related issue to CVE-2019-20454.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

JBoss Core Services: 2.4.37 SP8 - 2.4.37 SP9

jbcs-httpd24-mod_security (Red Hat package): 2.9.2-16.GA.jbcs.el7 - 2.9.2-65.GA.jbcs.el7

jbcs-httpd24-mod_md (Red Hat package): 2.0.8-24.jbcs.el7 - 2.0.8-38.jbcs.el7

jbcs-httpd24-mod_http2 (Red Hat package): 1.15.7-3.jbcs.el7 - 1.15.7-19.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el7 - 2.4.37-76.jbcs.el7

jbcs-httpd24-openssl-pkcs11 (Red Hat package): 0.4.10-7.jbcs.el7 - 0.4.10-20.jbcs.el7

jbcs-httpd24-openssl-chil (Red Hat package): 1.0.0-3.jbcs.el7 - 1.0.0-5.jbcs.el7

jbcs-httpd24-nghttp2 (Red Hat package): 1.39.2-1.jbcs.el7 - 1.39.2-37.jbcs.el7

jbcs-httpd24-curl (Red Hat package): 7.64.1-14.jbcs.el7 - 7.77.0-2.jbcs.el7

jbcs-httpd24-apr-util (Red Hat package): 1.6.1-9.jbcs.el7 - 1.6.1-82.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el7 - 1.6.3-105.jbcs.el7

External links

http://access.redhat.com/errata/RHSA-2021:4614


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) NULL pointer dereference

EUVDB-ID: #VU53776

Risk: Low

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-26691

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 in mod_session. A a malicious backend server or SessionHeader can trigger a denial of service (DoS) condition.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

JBoss Core Services: 2.4.37 SP8 - 2.4.37 SP9

jbcs-httpd24-mod_security (Red Hat package): 2.9.2-16.GA.jbcs.el7 - 2.9.2-65.GA.jbcs.el7

jbcs-httpd24-mod_md (Red Hat package): 2.0.8-24.jbcs.el7 - 2.0.8-38.jbcs.el7

jbcs-httpd24-mod_http2 (Red Hat package): 1.15.7-3.jbcs.el7 - 1.15.7-19.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el7 - 2.4.37-76.jbcs.el7

jbcs-httpd24-openssl-pkcs11 (Red Hat package): 0.4.10-7.jbcs.el7 - 0.4.10-20.jbcs.el7

jbcs-httpd24-openssl-chil (Red Hat package): 1.0.0-3.jbcs.el7 - 1.0.0-5.jbcs.el7

jbcs-httpd24-nghttp2 (Red Hat package): 1.39.2-1.jbcs.el7 - 1.39.2-37.jbcs.el7

jbcs-httpd24-curl (Red Hat package): 7.64.1-14.jbcs.el7 - 7.77.0-2.jbcs.el7

jbcs-httpd24-apr-util (Red Hat package): 1.6.1-9.jbcs.el7 - 1.6.1-82.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el7 - 1.6.3-105.jbcs.el7

External links

http://access.redhat.com/errata/RHSA-2021:4614


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) NULL pointer dereference

EUVDB-ID: #VU53778

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-2020-13950

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 in mod_proxy_http. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

JBoss Core Services: 2.4.37 SP8 - 2.4.37 SP9

jbcs-httpd24-mod_security (Red Hat package): 2.9.2-16.GA.jbcs.el7 - 2.9.2-65.GA.jbcs.el7

jbcs-httpd24-mod_md (Red Hat package): 2.0.8-24.jbcs.el7 - 2.0.8-38.jbcs.el7

jbcs-httpd24-mod_http2 (Red Hat package): 1.15.7-3.jbcs.el7 - 1.15.7-19.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el7 - 2.4.37-76.jbcs.el7

jbcs-httpd24-openssl-pkcs11 (Red Hat package): 0.4.10-7.jbcs.el7 - 0.4.10-20.jbcs.el7

jbcs-httpd24-openssl-chil (Red Hat package): 1.0.0-3.jbcs.el7 - 1.0.0-5.jbcs.el7

jbcs-httpd24-nghttp2 (Red Hat package): 1.39.2-1.jbcs.el7 - 1.39.2-37.jbcs.el7

jbcs-httpd24-curl (Red Hat package): 7.64.1-14.jbcs.el7 - 7.77.0-2.jbcs.el7

jbcs-httpd24-apr-util (Red Hat package): 1.6.1-9.jbcs.el7 - 1.6.1-82.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el7 - 1.6.3-105.jbcs.el7

External links

http://access.redhat.com/errata/RHSA-2021:4614


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) Input validation error

EUVDB-ID: #VU53774

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-30641

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to incorrect parsing of Apache configuration files. An unexpected section could be matched with 'MergeSlashes OFF' option, leading to a potential security issue.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

JBoss Core Services: 2.4.37 SP8 - 2.4.37 SP9

jbcs-httpd24-mod_security (Red Hat package): 2.9.2-16.GA.jbcs.el7 - 2.9.2-65.GA.jbcs.el7

jbcs-httpd24-mod_md (Red Hat package): 2.0.8-24.jbcs.el7 - 2.0.8-38.jbcs.el7

jbcs-httpd24-mod_http2 (Red Hat package): 1.15.7-3.jbcs.el7 - 1.15.7-19.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el7 - 2.4.37-76.jbcs.el7

jbcs-httpd24-openssl-pkcs11 (Red Hat package): 0.4.10-7.jbcs.el7 - 0.4.10-20.jbcs.el7

jbcs-httpd24-openssl-chil (Red Hat package): 1.0.0-3.jbcs.el7 - 1.0.0-5.jbcs.el7

jbcs-httpd24-nghttp2 (Red Hat package): 1.39.2-1.jbcs.el7 - 1.39.2-37.jbcs.el7

jbcs-httpd24-curl (Red Hat package): 7.64.1-14.jbcs.el7 - 7.77.0-2.jbcs.el7

jbcs-httpd24-apr-util (Red Hat package): 1.6.1-9.jbcs.el7 - 1.6.1-82.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el7 - 1.6.3-105.jbcs.el7

External links

http://access.redhat.com/errata/RHSA-2021:4614


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) Stack-based buffer overflow

EUVDB-ID: #VU53775

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-2020-35452

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error when processing Digest nounces in mod_auth_digest. A remote unauthenticated attacker can send a specially crafted HTTP request, trigger stack overflow by one nul byte and crash the server.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

JBoss Core Services: 2.4.37 SP8 - 2.4.37 SP9

jbcs-httpd24-mod_security (Red Hat package): 2.9.2-16.GA.jbcs.el7 - 2.9.2-65.GA.jbcs.el7

jbcs-httpd24-mod_md (Red Hat package): 2.0.8-24.jbcs.el7 - 2.0.8-38.jbcs.el7

jbcs-httpd24-mod_http2 (Red Hat package): 1.15.7-3.jbcs.el7 - 1.15.7-19.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el7 - 2.4.37-76.jbcs.el7

jbcs-httpd24-openssl-pkcs11 (Red Hat package): 0.4.10-7.jbcs.el7 - 0.4.10-20.jbcs.el7

jbcs-httpd24-openssl-chil (Red Hat package): 1.0.0-3.jbcs.el7 - 1.0.0-5.jbcs.el7

jbcs-httpd24-nghttp2 (Red Hat package): 1.39.2-1.jbcs.el7 - 1.39.2-37.jbcs.el7

jbcs-httpd24-curl (Red Hat package): 7.64.1-14.jbcs.el7 - 7.77.0-2.jbcs.el7

jbcs-httpd24-apr-util (Red Hat package): 1.6.1-9.jbcs.el7 - 1.6.1-82.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el7 - 1.6.3-105.jbcs.el7

External links

http://access.redhat.com/errata/RHSA-2021:4614


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.

8) NULL pointer dereference

EUVDB-ID: #VU50740

Risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-23841

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 within the X509_issuer_and_serial_hash() function when parsing the issuer field in the X509 certificate. A remote attacker can supply a specially crafted certificate, trigger a NULL pointer dereference error and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

JBoss Core Services: 2.4.37 SP8 - 2.4.37 SP9

jbcs-httpd24-mod_security (Red Hat package): 2.9.2-16.GA.jbcs.el7 - 2.9.2-65.GA.jbcs.el7

jbcs-httpd24-mod_md (Red Hat package): 2.0.8-24.jbcs.el7 - 2.0.8-38.jbcs.el7

jbcs-httpd24-mod_http2 (Red Hat package): 1.15.7-3.jbcs.el7 - 1.15.7-19.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el7 - 2.4.37-76.jbcs.el7

jbcs-httpd24-openssl-pkcs11 (Red Hat package): 0.4.10-7.jbcs.el7 - 0.4.10-20.jbcs.el7

jbcs-httpd24-openssl-chil (Red Hat package): 1.0.0-3.jbcs.el7 - 1.0.0-5.jbcs.el7

jbcs-httpd24-nghttp2 (Red Hat package): 1.39.2-1.jbcs.el7 - 1.39.2-37.jbcs.el7

jbcs-httpd24-curl (Red Hat package): 7.64.1-14.jbcs.el7 - 7.77.0-2.jbcs.el7

jbcs-httpd24-apr-util (Red Hat package): 1.6.1-9.jbcs.el7 - 1.6.1-82.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el7 - 1.6.3-105.jbcs.el7

External links

http://access.redhat.com/errata/RHSA-2021:4614


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.

9) Out-of-bounds read

EUVDB-ID: #VU56064

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3712

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when processing ASN.1 strings related to a confusion with NULL termination of strings in array. A remote attacker can pass specially crafted data to the application to trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

JBoss Core Services: 2.4.37 SP8 - 2.4.37 SP9

jbcs-httpd24-mod_security (Red Hat package): 2.9.2-16.GA.jbcs.el7 - 2.9.2-65.GA.jbcs.el7

jbcs-httpd24-mod_md (Red Hat package): 2.0.8-24.jbcs.el7 - 2.0.8-38.jbcs.el7

jbcs-httpd24-mod_http2 (Red Hat package): 1.15.7-3.jbcs.el7 - 1.15.7-19.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el7 - 2.4.37-76.jbcs.el7

jbcs-httpd24-openssl-pkcs11 (Red Hat package): 0.4.10-7.jbcs.el7 - 0.4.10-20.jbcs.el7

jbcs-httpd24-openssl-chil (Red Hat package): 1.0.0-3.jbcs.el7 - 1.0.0-5.jbcs.el7

jbcs-httpd24-nghttp2 (Red Hat package): 1.39.2-1.jbcs.el7 - 1.39.2-37.jbcs.el7

jbcs-httpd24-curl (Red Hat package): 7.64.1-14.jbcs.el7 - 7.77.0-2.jbcs.el7

jbcs-httpd24-apr-util (Red Hat package): 1.6.1-9.jbcs.el7 - 1.6.1-82.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el7 - 1.6.3-105.jbcs.el7

External links

http://access.redhat.com/errata/RHSA-2021:4614


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.

10) Security restrictions bypass

EUVDB-ID: #VU53780

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-17567

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

The vulnerability exists due to unspecified error within the mod_proxy_wstunnel and mod_proxy_http modules. If mod_proxy_wstunnel is configured on an URL that is not necessarily Upgraded by the origin server and is tunneling the whole connection regardless, thus allowing for subsequent requests on the same connection to pass through with no HTTP validation, authentication or authorization possibly configured.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

JBoss Core Services: 2.4.37 SP8 - 2.4.37 SP9

jbcs-httpd24-mod_security (Red Hat package): 2.9.2-16.GA.jbcs.el7 - 2.9.2-65.GA.jbcs.el7

jbcs-httpd24-mod_md (Red Hat package): 2.0.8-24.jbcs.el7 - 2.0.8-38.jbcs.el7

jbcs-httpd24-mod_http2 (Red Hat package): 1.15.7-3.jbcs.el7 - 1.15.7-19.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el7 - 2.4.37-76.jbcs.el7

jbcs-httpd24-openssl-pkcs11 (Red Hat package): 0.4.10-7.jbcs.el7 - 0.4.10-20.jbcs.el7

jbcs-httpd24-openssl-chil (Red Hat package): 1.0.0-3.jbcs.el7 - 1.0.0-5.jbcs.el7

jbcs-httpd24-nghttp2 (Red Hat package): 1.39.2-1.jbcs.el7 - 1.39.2-37.jbcs.el7

jbcs-httpd24-curl (Red Hat package): 7.64.1-14.jbcs.el7 - 7.77.0-2.jbcs.el7

jbcs-httpd24-apr-util (Red Hat package): 1.6.1-9.jbcs.el7 - 1.6.1-82.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el7 - 1.6.3-105.jbcs.el7

External links

http://access.redhat.com/errata/RHSA-2021:4614


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.

11) NULL pointer dereference

EUVDB-ID: #VU53777

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-2021-26690

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 in mod_session. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

JBoss Core Services: 2.4.37 SP8 - 2.4.37 SP9

jbcs-httpd24-mod_security (Red Hat package): 2.9.2-16.GA.jbcs.el7 - 2.9.2-65.GA.jbcs.el7

jbcs-httpd24-mod_md (Red Hat package): 2.0.8-24.jbcs.el7 - 2.0.8-38.jbcs.el7

jbcs-httpd24-mod_http2 (Red Hat package): 1.15.7-3.jbcs.el7 - 1.15.7-19.jbcs.el7

jbcs-httpd24-httpd (Red Hat package): 2.4.37-33.jbcs.el7 - 2.4.37-76.jbcs.el7

jbcs-httpd24-openssl-pkcs11 (Red Hat package): 0.4.10-7.jbcs.el7 - 0.4.10-20.jbcs.el7

jbcs-httpd24-openssl-chil (Red Hat package): 1.0.0-3.jbcs.el7 - 1.0.0-5.jbcs.el7

jbcs-httpd24-nghttp2 (Red Hat package): 1.39.2-1.jbcs.el7 - 1.39.2-37.jbcs.el7

jbcs-httpd24-curl (Red Hat package): 7.64.1-14.jbcs.el7 - 7.77.0-2.jbcs.el7

jbcs-httpd24-apr-util (Red Hat package): 1.6.1-9.jbcs.el7 - 1.6.1-82.jbcs.el7

jbcs-httpd24-apr (Red Hat package): 1.6.3-14.jbcs.el7 - 1.6.3-105.jbcs.el7

External links

http://access.redhat.com/errata/RHSA-2021:4614


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.



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