USN-3123-1: curl vulnerabilities

Releases

• Ubuntu 16.10
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

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

Details

It was discovered that curl incorrectly reused client certificates when
built with NSS. A remote attacker could possibly use this issue to hijack
the authentication of a TLS connection. (CVE-2016-7141)

Nguyen Vu Hoang discovered that curl incorrectly handled escaping certain
strings. A remote attacker could possibly use this issue to cause curl to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2016-7167)

It was discovered that curl incorrectly handled storing cookies. A remote
attacker could possibly use this issue to inject cookies for arbitrary
domains in the cookie jar. (CVE-2016-8615)

It was discovered that curl incorrect handled case when comparing user
names and passwords. A remote attacker with knowledge of a case-insensitive
version of the correct password could possibly use this issue to cause
a connection to be reused. (CVE-2016-8616)

It was discovered that curl incorrect handled memory when encoding to
base64. A remote attacker could possibly use this issue to cause curl to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2016-8617)

It was discovered that curl incorrect handled memory when preparing
formatted output. A remote attacker could possibly use this issue to cause
curl to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2016-8618)

It was discovered that curl incorrect handled memory when performing
Kerberos authentication. A remote attacker could possibly use this issue to
cause curl to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2016-8619)

Luật Nguyễn discovered that curl incorrectly handled parsing globs. A
remote attacker could possibly use this issue to cause curl to crash,
resulting in a denial of service, or possibly execute arbitrary code. This
issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10.
(CVE-2016-8620)

Luật Nguyễn discovered that curl incorrectly handled converting dates. A
remote attacker could possibly use this issue to cause curl to crash,
resulting in a denial of service. (CVE-2016-8621)

It was discovered that curl incorrectly handled URL percent-encoding
decoding. A remote attacker could possibly use this issue to cause curl to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2016-8622)

It was discovered that curl incorrectly handled shared cookies. A remote
server could possibly obtain incorrect cookies or other sensitive
information. (CVE-2016-8623)

Fernando Muñoz discovered that curl incorrect parsed certain URLs. A remote
attacker could possibly use this issue to trick curl into connecting to a
different host. (CVE-2016-8624)

Update instructions

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

Ubuntu 16.10

• libcurl3 - 7.50.1-1ubuntu1.1
• libcurl3-gnutls - 7.50.1-1ubuntu1.1
• libcurl3-nss - 7.50.1-1ubuntu1.1

Ubuntu 16.04

• libcurl3 - 7.47.0-1ubuntu2.2
• libcurl3-gnutls - 7.47.0-1ubuntu2.2
• libcurl3-nss - 7.47.0-1ubuntu2.2

Ubuntu 14.04

• libcurl3 - 7.35.0-1ubuntu2.10
• libcurl3-gnutls - 7.35.0-1ubuntu2.10
• libcurl3-nss - 7.35.0-1ubuntu2.10

Ubuntu 12.04

• libcurl3 - 7.22.0-3ubuntu4.17
• libcurl3-gnutls - 7.22.0-3ubuntu4.17
• libcurl3-nss - 7.22.0-3ubuntu4.17

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

References

• CVE-2016-7141
• CVE-2016-7167
• CVE-2016-8615
• CVE-2016-8616
• CVE-2016-8617
• CVE-2016-8618
• CVE-2016-8619
• CVE-2016-8620
• CVE-2016-8621
• CVE-2016-8622
• CVE-2016-8623
• CVE-2016-8624