Debian: Security Advisory for curl (DSA-4881-1)

Published: 2021-04-01 03:00:20
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P

Summary:
The remote host is missing an update for the 'curl' Linux Distribution Package(s) announced via the DSA-4881-1 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
Multiple vulnerabilities were discovered in cURL, an URL transfer library: CVE-2020-8169 Marek Szlagor reported that libcurl could be tricked into prepending a part of the password to the host name before it resolves it, potentially leaking the partial password over the network and to the DNS server(s). CVE-2020-8177 sn reported that curl could be tricked by a malicious server into overwriting a local file when using the -J (--remote-header-name) and -i (--include) options in the same command line. CVE-2020-8231 Marc Aldorasi reported that libcurl might use the wrong connection when an application using libcurl's multi API sets the option CURLOPT_CONNECT_ONLY, which could lead to information leaks. CVE-2020-8284 Varnavas Papaioannou reported that a malicious server could use the PASV response to trick curl into connecting back to an arbitrary IP address and port, potentially making curl extract information about services that are otherwise private and not disclosed. CVE-2020-8285 xnynx reported that libcurl could run out of stack space when using the FTP wildcard matching functionality (CURLOPT_CHUNK_BGN_FUNCTION). CVE-2020-8286 It was reported that libcurl didn't verify that an OCSP response actually matches the certificate it is intended to. CVE-2021-22876 Viktor Szakats reported that libcurl does not strip off user credentials from the URL when automatically populating the Referer HTTP request header field in outgoing HTTP requests. CVE-2021-22890 Mingtao Yang reported that, when using an HTTPS proxy and TLS 1.3, libcurl could confuse session tickets arriving from the HTTPS proxy as if they arrived from the remote server instead. This could allow an HTTPS proxy to trick libcurl into using the wrong session ticket for the host and thereby circumvent the server TLS certificate check.

Affected Versions:
'curl' Linux Distribution Package(s) on Debian Linux.

Recommendations:
For the stable distribution (buster), these problems have been fixed in version 7.64.0-4+deb10u2. We recommend that you upgrade your curl Linux Distribution Packages.

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2020-8169
https://nvd.nist.gov/vuln/detail/CVE-2020-8177
https://nvd.nist.gov/vuln/detail/CVE-2020-8231
https://nvd.nist.gov/vuln/detail/CVE-2020-8284
https://nvd.nist.gov/vuln/detail/CVE-2020-8285
https://nvd.nist.gov/vuln/detail/CVE-2020-8286
https://nvd.nist.gov/vuln/detail/CVE-2021-22876
https://nvd.nist.gov/vuln/detail/CVE-2021-22890

References:

https://www.debian.org/security/2021/dsa-4881.html
https://security-tracker.debian.org/tracker/DSA-4881-1

Severity
Medium
CVSS Score
5.0
Published
2021-04-01
Modified
2021-04-01
Category
Debian Local Security Checks

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