Out-of-bounds read in openssl (Alpine package)

1) Out-of-bounds read

EUVDB-ID: #VU32808

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2012-2333

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in Integer underflow in OpenSSL before 0.9.8x, 1.0.0 before 1.0.0j, and 1.0.1 before 1.0.1c, when TLS 1.1, TLS 1.2, or DTLS is used with CBC encryption,. A remote attacker can perform a denial of service (buffer over-read) or possibly have unspecified other impact via a crafted TLS packet that is not properly handled during a certain explicit IV calculation.

Mitigation

Install update from vendor's website.

Vulnerable software versions

openssl (Alpine package): 0.9.8l-r0 - 1.0.0b-r0

CPE2.3

• cpe:2.3:o:alpine:openssl_alpine_package:0.9.8l-r0:*:*:*:*:alpine_linux:*:1.9
• cpe:2.3:o:alpine:openssl_alpine_package:0.9.8m-r0:*:*:*:*:alpine_linux:*:1.9
• cpe:2.3:o:alpine:openssl_alpine_package:0.9.8x-r0:*:*:*:*:alpine_linux:*:1.10

External links

https://git.alpinelinux.org/aports/commit/?id=48d01c7c6a2f0100405a9577d9cdd631d3fa9800
https://git.alpinelinux.org/aports/commit/?id=049f48d3fd138f93aa604f3a89e18030585e9997
https://git.alpinelinux.org/aports/commit/?id=8d888cd61622ac57243993b73a882c9072b96b94
https://git.alpinelinux.org/aports/commit/?id=1831053bb87f432f0d45ccd9f7a368fc885a1d64

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.