Alpine: multiple apache2 packages: security update to 2.4.33-r0

critical Tenable Cloud Security Plugin ID 423647

Description

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

- In Apache httpd 2.2.0 to 2.4.29, when generating an HTTP Digest authentication challenge, the nonce sent
to prevent reply attacks was not correctly generated using a pseudo-random seed. In a cluster of servers
using a common Digest authentication configuration, HTTP requests could be replayed across servers by an
attacker without detection. (CVE-2018-1312)

- In Apache httpd 2.0.23 to 2.0.65, 2.2.0 to 2.2.34, and 2.4.0 to 2.4.29, mod_authnz_ldap, if configured
with AuthLDAPCharsetConfig, uses the Accept-Language header value to lookup the right charset encoding
when verifying the user's credentials. If the header value is not present in the charset conversion table,
a fallback mechanism is used to truncate it to a two characters value to allow a quick retry (for example,
'en-US' is truncated to 'en'). A header value of less than two characters forces an out of bound write of
one NUL byte to a memory location that is not part of the string. In the worst case, quite unlikely, the
process would crash which could be used as a Denial of Service attack. In the more likely case, this
memory is already reserved for future use and the issue has no effect at all. (CVE-2017-15710)

- In Apache httpd 2.4.0 to 2.4.29, the expression specified in <FilesMatch> could match '$' to a newline
character in a malicious filename, rather than matching only the end of the filename. This could be
exploited in environments where uploads of some files are are externally blocked, but only by matching the
trailing portion of the filename. (CVE-2017-15715)

- In Apache httpd 2.4.0 to 2.4.29, when mod_session is configured to forward its session data to CGI
applications (SessionEnv on, not the default), a remote user may influence their content by using a
"Session" header. This comes from the "HTTP_SESSION" variable name used by mod_session to forward its data
to CGIs, since the prefix "HTTP_" is also used by the Apache HTTP Server to pass HTTP header fields, per
CGI specifications. (CVE-2018-1283)

- A specially crafted request could have crashed the Apache HTTP Server prior to version 2.4.30, due to an
out of bound access after a size limit is reached by reading the HTTP header. This vulnerability is
considered very hard if not impossible to trigger in non-debug mode (both log and build level), so it is
classified as low risk for common server usage. (CVE-2018-1301)

Plugin Details

Severity: Critical

ID: 423647

Version: Revision 1.8

Type: Local

Family: Alpine Linux Local Security Checks

Published: 4/4/2025

Updated: 7/2/2026

Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 94.66

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2018-1312

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 3/21/2018

Reference Information

CVE: CVE-2017-15710, CVE-2017-15715, CVE-2018-1283, CVE-2018-1301, CVE-2018-1302, CVE-2018-1303, CVE-2018-1312

BID: 103512, 103515, 103520, 103522, 103524, 103525, 103528

IAVA: 2018-A-0089-S

Detections

Analytics