ALAS-2019-1148

Amazon Linux 1 Security Advisory: ALAS-2019-1148
Advisory Release Date: 2019-01-21 23:46 Pacific
Advisory Updated Date: 2019-01-25 03:51 Pacific
Severity: Low
Issue Overview:

A heap use-after-free flaw was found in curl related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct. (CVE-2018-16840)

Curl is vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service. (CVE-2018-16839)

Curl is vulnerable to a heap-based buffer over-read in the tool_msgs.c:voutf() function that may result in information exposure and denial of service. (CVE-2018-16842)


Affected Packages:

curl


Issue Correction:
Run yum update curl to update your system.

New Packages:
i686:
    libcurl-devel-7.53.1-16.86.amzn1.i686
    libcurl-7.53.1-16.86.amzn1.i686
    curl-7.53.1-16.86.amzn1.i686
    curl-debuginfo-7.53.1-16.86.amzn1.i686

src:
    curl-7.53.1-16.86.amzn1.src

x86_64:
    libcurl-7.53.1-16.86.amzn1.x86_64
    libcurl-devel-7.53.1-16.86.amzn1.x86_64
    curl-7.53.1-16.86.amzn1.x86_64
    curl-debuginfo-7.53.1-16.86.amzn1.x86_64

Additional References

Red Hat: CVE-2018-16839, CVE-2018-16840, CVE-2018-16842

Mitre: CVE-2018-16839, CVE-2018-16840, CVE-2018-16842