openEuler 20.03 LTS SP1 update for httpd
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) 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
DescriptionThe 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.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsopenEuler: 20.03 LTS SP1
httpd-filesystem: before 2.4.43-7
httpd-help: before 2.4.43-7
mod_proxy_html: before 2.4.43-7
mod_session: before 2.4.43-7
mod_ldap: before 2.4.43-7
httpd-debuginfo: before 2.4.43-7
httpd-debugsource: before 2.4.43-7
httpd-tools: before 2.4.43-7
httpd-devel: before 2.4.43-7
mod_md: before 2.4.43-7
mod_ssl: before 2.4.43-7
httpd: before 2.4.43-7
External linkshttp://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1246
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) 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
DescriptionThe 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.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsopenEuler: 20.03 LTS SP1
httpd-filesystem: before 2.4.43-7
httpd-help: before 2.4.43-7
mod_proxy_html: before 2.4.43-7
mod_session: before 2.4.43-7
mod_ldap: before 2.4.43-7
httpd-debuginfo: before 2.4.43-7
httpd-debugsource: before 2.4.43-7
httpd-tools: before 2.4.43-7
httpd-devel: before 2.4.43-7
mod_md: before 2.4.43-7
mod_ssl: before 2.4.43-7
httpd: before 2.4.43-7
External linkshttp://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1246
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) 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
DescriptionThe 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.
Install updates from vendor's repository.
Vulnerable software versionsopenEuler: 20.03 LTS SP1
httpd-filesystem: before 2.4.43-7
httpd-help: before 2.4.43-7
mod_proxy_html: before 2.4.43-7
mod_session: before 2.4.43-7
mod_ldap: before 2.4.43-7
httpd-debuginfo: before 2.4.43-7
httpd-debugsource: before 2.4.43-7
httpd-tools: before 2.4.43-7
httpd-devel: before 2.4.43-7
mod_md: before 2.4.43-7
mod_ssl: before 2.4.43-7
httpd: before 2.4.43-7
External linkshttp://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1246
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) 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
DescriptionThe vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to incorrect parsing of Apache configuration files. An unexpected
Install updates from vendor's repository.
Vulnerable software versionsopenEuler: 20.03 LTS SP1
httpd-filesystem: before 2.4.43-7
httpd-help: before 2.4.43-7
mod_proxy_html: before 2.4.43-7
mod_session: before 2.4.43-7
mod_ldap: before 2.4.43-7
httpd-debuginfo: before 2.4.43-7
httpd-debugsource: before 2.4.43-7
httpd-tools: before 2.4.43-7
httpd-devel: before 2.4.43-7
mod_md: before 2.4.43-7
mod_ssl: before 2.4.43-7
httpd: before 2.4.43-7
External linkshttp://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1246
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.
