Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2016-9942 |
CWE-ID | CWE-119 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
libvncserver (Alpine package) Operating systems & Components / Operating system package or component |
Vendor | Alpine Linux Development Team |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU3077
Risk: Medium
CVSSv3.1: 7.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-9942
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on vulnerable client system.
A heap-based buffer overflow vulnerability exists due to boundary error in ultra.c in LibVNCClient software, which is bundled with LibVNCServer. A remote attacker can trick the victim to connect to malicious VNC server, send a specially crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions, and trigger buffer overflow.
Successful exploitation of the vulnerability may allow an attacker to execute arbitrary code on vulnerable VNC client.
Install update from vendor's website.
Vulnerable software versionslibvncserver (Alpine package): 0.9.10-r0 - 0.9.10-r1
External linkshttp://git.alpinelinux.org/aports/commit/?id=e3a33d48d59a183072d3ee0da1298f28fc3f2f11
http://git.alpinelinux.org/aports/commit/?id=8cb1ee23b7bc0d719ec7229ba43bf47891d68dbf
http://git.alpinelinux.org/aports/commit/?id=ef8044ed82008b70d1e6fc86b340d60d3c0d16a0
http://git.alpinelinux.org/aports/commit/?id=83306a1e68a975015228808acbbf183570ce3823
http://git.alpinelinux.org/aports/commit/?id=5b2a32c3074c1e9abc0f0490c264335336ffc172
http://git.alpinelinux.org/aports/commit/?id=14594bb55cbbf5113e844d4c8e550fc247ee550a
http://git.alpinelinux.org/aports/commit/?id=09e180651f0e822f8487bf871bcac7b44a2e383a
http://git.alpinelinux.org/aports/commit/?id=f7fc7fd109145de79a4568d1b3f615ba4013b72a
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.