RHSA-2021:1610 - Security Advisory

Topic

An update for curl is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The curl packages provide the libcurl library and the curl utility for downloading files from servers using various protocols, including HTTP, FTP, and LDAP.

Security Fix(es):

• curl: FTP PASV command response can cause curl to connect to arbitrary host (CVE-2020-8284)
• curl: Malicious FTP server can trigger stack overflow when CURLOPT_CHUNK_BGN_FUNCTION is used (CVE-2020-8285)
• curl: Inferior OCSP verification (CVE-2020-8286)
• curl: Expired pointer dereference via multi API with CURLOPT_CONNECT_ONLY option set (CVE-2020-8231)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.4 Release Notes linked from the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for ARM 64 8 aarch64

Fixes

• BZ - 1868032 - CVE-2020-8231 curl: Expired pointer dereference via multi API with CURLOPT_CONNECT_ONLY option set
• BZ - 1873327 - libcurl: Segfault when HTTPS_PROXY and NO_PROXY is used together
• BZ - 1895391 - multiarch conflicts in libcurl-minimal
• BZ - 1902667 - CVE-2020-8284 curl: FTP PASV command response can cause curl to connect to arbitrary host
• BZ - 1902687 - CVE-2020-8285 curl: Malicious FTP server can trigger stack overflow when CURLOPT_CHUNK_BGN_FUNCTION is used
• BZ - 1906096 - CVE-2020-8286 curl: Inferior OCSP verification
• BZ - 1918692 - Body dropped from POST request when using proxy with NTLM authentication

CVEs

• CVE-2020-8231
• CVE-2020-8284
• CVE-2020-8285
• CVE-2020-8286

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/