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CVE-2020-12399

Status Candidate

Overview

NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually leak private keys. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.

Related Files

Gentoo Linux Security Advisory 202007-49
Posted Jul 27, 2020
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202007-49 - NSS has an information disclosure vulnerability when handling DSA keys. Versions less than 3.52.1 are affected.

tags | advisory, info disclosure
systems | linux, gentoo
advisories | CVE-2020-12399
MD5 | 4a852924b4ae34fc98fa7071801bc91e
Ubuntu Security Notice USN-4421-1
Posted Jul 8, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4421-1 - Multiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, or execute arbitrary code. It was discovered that Thunderbird would continue an unencrypted connection when configured to use STARTTLS for IMAP if the server responded with PREAUTH. A remote attacker could potentially exploit this to perform a person-in-the-middle attack in order to obtain sensitive information. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, imap
systems | linux, ubuntu
advisories | CVE-2020-12398, CVE-2020-12399, CVE-2020-12406, CVE-2020-12410, CVE-2020-12419, CVE-2020-12420, CVE-2020-12421
MD5 | 326f5ebac4547f863a712734770a0ae2
Ubuntu Security Notice USN-4397-2
Posted Jun 17, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4397-2 - USN-4397-1 fixed a vulnerability in NSS. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. Cesar Pereida Garcia discovered that NSS incorrectly handled DSA key generation. A local attacker could possibly use this issue to perform a timing attack and recover DSA keys. Various other issues were also addressed.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2020-12399
MD5 | 59cf6ce8a438927a2d01029a21c63e00
Ubuntu Security Notice USN-4397-1
Posted Jun 16, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4397-1 - It was discovered that NSS incorrectly handled the TLS State Machine. A remote attacker could possibly use this issue to cause NSS to hang, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 19.10. Cesar Pereida Garcia discovered that NSS incorrectly handled DSA key generation. A local attacker could possibly use this issue to perform a timing attack and recover DSA keys. Various other issues were also addressed.

tags | advisory, remote, denial of service, local
systems | linux, ubuntu
advisories | CVE-2019-17023, CVE-2020-12399
MD5 | 394e975df72ff7664f636a86cddc7604
Ubuntu Security Notice USN-4383-1
Posted Jun 5, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4383-1 - Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, spoof the addressbar, or execute arbitrary code. It was discovered that NSS showed timing differences when performing DSA signatures. An attacker could potentially exploit this to obtain private keys using a timing attack. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, spoof
systems | linux, ubuntu
advisories | CVE-2020-12399, CVE-2020-12407, CVE-2020-12408, CVE-2020-12411
MD5 | 7008565679641f0d4d2c4c80f6ec42cf
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