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Ubuntu Security Notice USN-5495-1

Ubuntu Security Notice 5495-1 - Harry Sintonen discovered that curl incorrectly handled certain cookies. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 21.10, and Ubuntu 22.04 LTS. Harry Sintonen discovered that curl incorrectly handled certain HTTP compressions. An attacker could possibly use this issue to cause a denial of service. Harry Sintonen incorrectly handled certain file permissions. An attacker could possibly use this issue to expose sensitive information. This issue only affected Ubuntu 21.10, and Ubuntu 22.04 LTS.

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#vulnerability#mac#ubuntu#dos#ssl

==========================================================================
Ubuntu Security Notice USN-5495-1
June 27, 2022

curl vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 22.04 LTS
  • Ubuntu 21.10
  • Ubuntu 20.04 LTS
  • Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in curl.

Software Description:

  • curl: HTTP, HTTPS, and FTP client and client libraries

Details:

Harry Sintonen discovered that curl incorrectly handled certain cookies.
An attacker could possibly use this issue to cause a denial of service.
This issue only affected Ubuntu 21.10, and Ubuntu 22.04 LTS. (CVE-2022-32205)

Harry Sintonen discovered that curl incorrectly handled certain HTTP compressions.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2022-32206)

Harry Sintonen incorrectly handled certain file permissions.
An attacker could possibly use this issue to expose sensitive information.
This issue only affected Ubuntu 21.10, and Ubuntu 22.04 LTS. (CVE-2022-32207)

Harry Sintonen discovered that curl incorrectly handled certain FTP-KRB messages.
An attacker could possibly use this to perform a machine-in-the-diddle attack.
(CVE-2022-32208)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS:
curl 7.81.0-1ubuntu1.3
libcurl3-gnutls 7.81.0-1ubuntu1.3
libcurl3-nss 7.81.0-1ubuntu1.3
libcurl4 7.81.0-1ubuntu1.3

Ubuntu 21.10:
curl 7.74.0-1.3ubuntu2.3
libcurl3-gnutls 7.74.0-1.3ubuntu2.3
libcurl3-nss 7.74.0-1.3ubuntu2.3
libcurl4 7.74.0-1.3ubuntu2.3

Ubuntu 20.04 LTS:
curl 7.68.0-1ubuntu2.12
libcurl3-gnutls 7.68.0-1ubuntu2.12
libcurl3-nss 7.68.0-1ubuntu2.12
libcurl4 7.68.0-1ubuntu2.12

Ubuntu 18.04 LTS:
curl 7.58.0-2ubuntu3.19
libcurl3-gnutls 7.58.0-2ubuntu3.19
libcurl3-nss 7.58.0-2ubuntu3.19
libcurl4 7.58.0-2ubuntu3.19

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-5495-1
CVE-2022-32205, CVE-2022-32206, CVE-2022-32207, CVE-2022-32208

Package Information:
https://launchpad.net/ubuntu/+source/curl/7.81.0-1ubuntu1.3
https://launchpad.net/ubuntu/+source/curl/7.74.0-1.3ubuntu2.3
https://launchpad.net/ubuntu/+source/curl/7.68.0-1ubuntu2.12
https://launchpad.net/ubuntu/+source/curl/7.58.0-2ubuntu3.19

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CVE-2022-32208

When curl < 7.84.0 does FTP transfers secured by krb5, it handles message verification failures wrongly. This flaw makes it possible for a Man-In-The-Middle attack to go unnoticed and even allows it to inject data to the client.

CVE-2022-32207

When curl < 7.84.0 saves cookies, alt-svc and hsts data to local files, it makes the operation atomic by finalizing the operation with a rename from a temporary name to the final target file name.In that rename operation, it might accidentally *widen* the permissions for the target file, leaving the updated file accessible to more users than intended.

CVE-2022-32206

curl < 7.84.0 supports "chained" HTTP compression algorithms, meaning that a serverresponse can be compressed multiple times and potentially with different algorithms. The number of acceptable "links" in this "decompression chain" was unbounded, allowing a malicious server to insert a virtually unlimited number of compression steps.The use of such a decompression chain could result in a "malloc bomb", makingcurl end up spending enormous amounts of allocated heap memory, or trying toand returning out of memory errors.

CVE-2022-32205

A malicious server can serve excessive amounts of `Set-Cookie:` headers in a HTTP response to curl and curl < 7.84.0 stores all of them. A sufficiently large amount of (big) cookies make subsequent HTTP requests to this, or other servers to which the cookies match, create requests that become larger than the threshold that curl uses internally to avoid sending crazy large requests (1048576 bytes) and instead returns an error.This denial state might remain for as long as the same cookies are kept, match and haven't expired. Due to cookie matching rules, a server on `foo.example.com` can set cookies that also would match for `bar.example.com`, making it it possible for a "sister server" to effectively cause a denial of service for a sibling site on the same second level domain using this method.

Ubuntu Security Notice USN-5499-1

Ubuntu Security Notice 5499-1 - Florian Kohnhuser discovered that curl incorrectly handled returning a TLS server’s certificate chain details. A remote attacker could possibly use this issue to cause curl to stop responding, resulting in a denial of service. Harry Sintonen discovered that curl incorrectly handled certain FTP-KRB messages. An attacker could possibly use this to perform a machine-in-the-middle attack.

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