Ubuntu update for LibGD



Published: 2017-08-14
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2017-7890
CWE-ID CWE-200
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Ubuntu
Operating systems & Components / Operating system

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU11789

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2017-7890

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information.

The weakness exists in the GIF decoding function gdImageCreateFromGifCtx in gd_gif_in.c due to it does not zero colorMap arrays before use. A remote attacker can trick the victim into opening a specially crafted GIF image that could use the uninitialized tables to read ~700 bytes from the top of the stack and gain access to potentially sensitive information.

Mitigation

Update the affected packages

Ubuntu 17.04:
libgd-tools 2.2.4-2ubuntu0.2
Ubuntu 16.04 LTS:
libgd-tools 2.1.1-4ubuntu0.16.04.7
Ubuntu 14.04 LTS:
libgd-tools 2.1.0-3ubuntu0.7

Vulnerable software versions

Ubuntu: 17.04, 16.04, 14.04


CPE2.3 External links

http://www.ubuntu.com/usn/usn-3389-1/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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