Summary
Marc Aldorasi discovered that curl incorrectly handled the libcurl
CURLOPT_CONNECT_ONLY option. This could result in data being sent to the
wrong destination, possibly exposing sensitive information. This issue only
affected Ubuntu 20.10. (CVE-2020-8231)
Varnavas Papaioannou discovered that curl incorrectly handled FTP PASV
responses. An attacker could possibly use this issue to trick curl into
connecting to an arbitrary IP address and be used to perform port scanner
and other information gathering. (CVE-2020-8284)
It was discovered that curl incorrectly handled FTP wildcard matchins. A
remote attacker could possibly use this issue to cause curl to consume
resources and crash, resulting in a denial of service. (CVE-2020-8285)
It was discovered that curl incorrectly handled OCSP response verification.
A remote attacker could possibly use this issue to provide a fraudulent
OCSP response. (CVE-2020-8286)
Fixed packages 3
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 16.04 LTS 16.04:LTS | curl | 7.47.0-1ubuntu2.18 |
| Ubuntu · 18.04 LTS 18.04:LTS | curl | 7.58.0-2ubuntu3.12 |
| Ubuntu · 20.04 LTS 20.04:LTS | curl | 7.68.0-1ubuntu2.4 |
Vulnerabilities 4
-
High 7.5
curl 7.21.0 to and including 7.73.0 is vulnerable to uncontrolled recursion due to a stack overflow issue in FTP wildca…
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Low 3.7
A malicious server can use the FTP PASV response to trick curl 7.73.0 and earlier into connecting back to a given IP ad…
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Unscored —
Due to use of a dangling pointer, libcurl 7.29.0 through 7.71.1 can use the wrong connection when sending data.
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Unscored —
curl 7.41.0 through 7.73.0 is vulnerable to an improper check for certificate revocation due to insufficient verificati…