Race condition in openssl (Alpine package)

1) Race condition

EUVDB-ID: #VU11535

Risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2010-5298

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

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

The vulnerability exists due to a race condition in the ssl3_read_bytes() function in OpenSSL. A remote attacker can inject data across sessions or cause a denial of service

Successful exploitation of the vulnerability requires that SSL_MODE_RELEASE_BUFFERS is enabled.

Mitigation

Install update from vendor's website.

Vulnerable software versions

openssl (Alpine package): 1.0.0c-r0 - 1.0.1b-r0

CPE2.3

• cpe:2.3:o:alpine:openssl_alpine_package:1.0.0c-r0:*:*:*:*:alpine_linux:*:2.0
• cpe:2.3:o:alpine:openssl_alpine_package:1.0.0f-r0:*:*:*:*:alpine_linux:*:2.1
• cpe:2.3:o:alpine:openssl_alpine_package:1.0.0k-r0:*:*:*:*:alpine_linux:*:2.2

External links

https://git.alpinelinux.org/aports/commit/?id=349a8dbcbe2cdadc9a5e8b9cc3fac06a37d46d2e
https://git.alpinelinux.org/aports/commit/?id=4456c9ec91d13627b3900075f8ac84ce97551679
https://git.alpinelinux.org/aports/commit/?id=68ec0bd5c91eb0247bd560c9b09d4d95dc3ad010

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.