SB2026060527 - Anolis OS update for httpd:2.4 module
Published: June 5, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 vulnerabilities.
1) Resource management error (CVE-ID: CVE-2025-53020)
CWE-ID: CWE-399 - Resource Management Errors
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within the server when handling HTTP/2 requests. A remote attacker can send multiple requests to the server and perform a denial of service (DoS) attack.
2) Heap-based buffer overflow (CVE-ID: CVE-2026-28780)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to cause a denial of service or potentially execute arbitrary code.
The vulnerability exists due to a heap-based buffer overflow in mod_proxy_ajp ajp_msg_check_header() when processing AJP messages from a backend server. A remote attacker can send a specially crafted AJP message to cause a denial of service or potentially execute arbitrary code.
The malicious AJP server can cause 4 attacker-controlled bytes to be written past the end of a heap-based buffer.
3) NULL pointer dereference (CVE-ID: CVE-2026-33007)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in mod_authn_socache when handling requests in a caching forward proxy configuration. A remote attacker can send a malicious request to cause a denial of service.
The issue crashes a child process only in a caching forward proxy configuration.
4) Out-of-bounds read (CVE-ID: CVE-2026-33857)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in mod_proxy_ajp AJP getter functions when parsing AJP data. A remote attacker can send a specially crafted AJP message to disclose sensitive information.
Exploitation requires Apache HTTP Server to connect to an untrusted or compromised AJP backend server.
5) Out-of-bounds read (CVE-ID: CVE-2026-34032)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper null termination leading to an out-of-bounds read in mod_proxy_ajp ajp_msg_get_string when parsing AJP string data. A remote attacker can send a specially crafted AJP message to disclose sensitive information.
Exploitation requires Apache HTTP Server to connect to an untrusted or compromised AJP backend server.
6) Out-of-bounds read (CVE-ID: CVE-2026-34059)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to a heap over-read in mod_proxy_ajp ajp_parse_data() when processing AJP messages from a backend server. A remote attacker can send a specially crafted AJP message to disclose sensitive information.
Exploitation requires Apache HTTP Server to connect to an untrusted or compromised AJP backend server.
Remediation
Install update from vendor's website.