Detections
Analytics
CentOS 9 : curl-7.76.1-12.el9
critical Nessus Plugin ID 191350
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Synopsis
The remote CentOS host is missing one or more security updates for curl.Description
The remote CentOS Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the curl-7.76.1-12.el9 build changelog.- When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it *again*. (CVE-2021-22945)
- A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSESSL_CONTROL` or `CURLUSESSL_ALL` withlibcurl). This requirement could be bypassed if the server would return a properly crafted but perfectly legitimate response.This flaw would then make curl silently continue its operations
**withoutTLS** contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network. (CVE-2021-22946)
- When curl >= 7.20.0 and <= 7.78.0 connects to an IMAP or POP3 server to retrieve data using STARTTLS to upgrade to TLS security, the server can respond and send back multiple responses at once that curl caches.
curl would then upgrade to TLS but not flush the in-queue of cached responses but instead continue using and trustingthe responses it got *before* the TLS handshake as if they were authenticated.Using this flaw, it allows a Man-In-The-Middle attacker to first inject the fake responses, then pass-through the TLS traffic from the legitimate server and trick curl into sending data back to the user thinking the attacker's injected data comes from the TLS-protected server. (CVE-2021-22947)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the CentOS 9 Stream curl package.See Also
https://kojihub.stream.centos.org/koji/buildinfo?buildID=14299
Plugin Details
Severity: Critical
ID: 191350
File Name: centos9_curl-7_76_1-12.nasl
Version: 1.1
Type: local
Agent: unix
Family: CentOS Local Security Checks
Published: 2/29/2024
Updated: 4/26/2024
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.0
CVSS v2
Risk Factor: Medium
Base Score: 5.8
Temporal Score: 4.5
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:P
CVSS Score Source: CVE-2021-22945
CVSS v3
Risk Factor: Critical
Base Score: 9.1
Temporal Score: 8.2
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:centos:centos:curl, cpe:/a:centos:centos:9, p-cpe:/a:centos:centos:libcurl, p-cpe:/a:centos:centos:libcurl-minimal, p-cpe:/a:centos:centos:libcurl-devel, p-cpe:/a:centos:centos:curl-minimal
Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list, Host/cpu
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 9/17/2021
Vulnerability Publication Date: 9/17/2021