Cryptographic issues in firefox (Alpine package)

1) Cryptographic issues

EUVDB-ID: #VU29460

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-12402

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: No

Description

The vulnerability allows a remote attacker to recover the secret primes.

During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform electromagnetic-based side channel attacks to record traces leading to the recovery of the secret primes.

Mitigation

Install update from vendor's website.

Vulnerable software versions

firefox (Alpine package): 70.0-r0 - 77.0.1-r4

CPE2.3

• cpe:2.3:a:alpine:firefox_alpine_package:70.0-r0:*:*:*:*:alpine_linux:*:3.10
• cpe:2.3:a:alpine:firefox_alpine_package:70.0-r1:*:*:*:*:alpine_linux:*:3.10
• cpe:2.3:a:alpine:firefox_alpine_package:70.0.1-r0:*:*:*:*:alpine_linux:*:3.10

External links

https://git.alpinelinux.org/aports/commit/?id=73339ff65b8ac577d3c49b1bae6fe0c5d8cf2e98
https://git.alpinelinux.org/aports/commit/?id=02f4c40162bc3c2f611ce86613bbf01f13e6146b
https://git.alpinelinux.org/aports/commit/?id=7ece421265010e81e06c3b8b9137b0b62f7acc73
https://git.alpinelinux.org/aports/commit/?id=d0f548c93f300779d1813359b060cf641865b16c
https://git.alpinelinux.org/aports/commit/?id=0ddce5a52e81427c9bb61f4fd23eec1127eae6eb

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.