ALPINE-CVE-2021-3449

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2021-3449
Published: 25 Mar 2021, 15:15
Last modified:03 Dec 2025, 22:48

Vulnerability Summary

Overall Risk (default)
low
24/100
CVSS Score
5.9 MEDIUM
3.1 (osv_alpine)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

25 Mar 2021, 15:15
Published
Vulnerability first disclosed
03 Dec 2025, 22:48
Last Modified
Vulnerability information updated

Description

An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j).

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Systems

  • alpine•openssl

    < 1.1.1k-r0 | < 1.1.1k-r0 | < 1.1.1k-r0 | < 1.1.1k-r0 | < 1.1.1k-r0 | < 1.1.1k-r0 | < 1.1.1k-r0 | < 1.1.1k-r0 | < 1.1.1k-r0 | < 1.1.1k-r0 | < 1.1.1k-r0 | < 1.1.1k-r0 | < 1.1.1k-r0 | < 1.1.1k-r0 | < 1.1.1k-r0

  • alpine•openssl3

    < 1.1.1k-r0 | < 1.1.1k-r0

References (1)