Information disclosure in php7 (Alpine package)
| 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 Subscribe |
php7 (Alpine package) Operating systems & Components / Operating system package or component |
| Vendor | Alpine Linux Development Team |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Information disclosure
EUVDB-ID: #VU11789
Risk: Low
CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-7890
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe 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.
MitigationInstall update from vendor's website.
Vulnerable software versionsphp7 (Alpine package): 7.1.9-r1
External linkshttp://git.alpinelinux.org/aports/commit/?id=fa666308ab37b32d9aef124a737b59ebd06a1f7a
http://git.alpinelinux.org/aports/commit/?id=c77ede20873cee5072a80b7d96cfdd045cc1bc7f
http://git.alpinelinux.org/aports/commit/?id=d6da87295c4d40896255b08ee5b73d8199e352cb
http://git.alpinelinux.org/aports/commit/?id=0dfd5e85b10c2aba69314b961c7023dcce1d1514
http://git.alpinelinux.org/aports/commit/?id=2163755a312b6f196914d74c863dcc8edfb81e0b
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
