Information disclosure in libebml (Alpine package)

1) Information disclosure

EUVDB-ID: #VU32313

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2015-8790

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The EbmlUnicodeString::UpdateFromUTF8 function in libEBML before 1.3.3 allows context-dependent attackers to obtain sensitive information from process heap memory via a crafted UTF-8 string, which triggers an invalid memory access.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libebml (Alpine package): 1.3.0-r0 - 1.3.1-r0

IBM Tivoli Storage Manager: before 5.3.6.6

libebml (Alpine package): before 1.0.10-0ubuntu1

libebml (Alpine package): before 5.1

libebml (Alpine package): before

CPE2.3

• cpe:2.3:a:alpine:libebml_alpine_package:1.3.0-r0:*:*:*:*:alpine_linux:*:2.6
• cpe:2.3:a:alpine:libebml_alpine_package:1.3.1-r0:*:*:*:*:alpine_linux:*:3.1
• cpe:2.3:a:ibm_corporation:ibm_tivoli_storage_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:alpine:libebml_alpine_package:*:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:libebml_alpine_package:*:*:*:*:*:alpine_linux:*:*
• cpe:2.3:a:alpine:libebml_alpine_package:*:*:*:*:*:alpine_linux:*:*

External links

https://git.alpinelinux.org/aports/commit/?id=a4e8e6dc97027afbb975c0afb5cf8a6cd1b942f1
https://git.alpinelinux.org/aports/commit/?id=f668c3070e9994e3d88eb1948856483588058d1d
https://git.alpinelinux.org/aports/commit/?id=a7d8463e968c58964a4a3624409a5554a5223b0a

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.