CVE-2019-1551
There is an overflow bug in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 14.3%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
Description
There is an overflow bug in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against 2-prime RSA1024, 3-prime RSA1536, and DSA1024 as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH512 are considered just feasible. However, for an attack the target would have to re-use the DH512 private key, which is not recommended anyway. Also applications directly using the low level API BN_mod_exp may be affected if they use BN_FLG_CONSTTIME. Fixed in OpenSSL 1.1.1e (Affected 1.1.1-1.1.1d). Fixed in OpenSSL 1.0.2u (Affected 1.0.2-1.0.2t).
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 14.30% probability · 96th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-190
- Affected
- openssl/openssl · opensuse/leap · oracle/enterprise manager ops center · oracle/mysql enterprise monitor · oracle/peoplesoft enterprise peopletools · canonical/ubuntu linux · fedoraproject/fedora · debian/debian linux · tenable/log correlation engine
- Source
- openssl-security@openssl.org
References
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00030.htmlMailing List, Third Party Advisory
- http://packetstormsecurity.com/files/155754/Slackware-Security-Advisory-openssl-Updates.htmlThird Party Advisory, VDB Entry
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=419102400a2811582a7a3d4a4e317d72e5ce0a8f
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=f1c5eea8a817075d31e43f5876993c6710238c98
- https://lists.debian.org/debian-lts-announce/2022/03/msg00023.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DDHOAATPWJCXRNFMJ2SASDBBNU5RJONY/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EXDDAOWSAIEFQNBHWYE6PPYFV4QXGMCD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XVEP3LAK4JSPRXFO4QF4GG2IVXADV3SO/
- https://seclists.org/bugtraq/2019/Dec/39Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Dec/46Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202004-10Third Party Advisory
- https://security.netapp.com/advisory/ntap-20191210-0001/Third Party Advisory
- https://usn.ubuntu.com/4376-1/Third Party Advisory
- https://usn.ubuntu.com/4504-1/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4594Third Party Advisory
- https://www.debian.org/security/2021/dsa-4855Third Party Advisory
- https://www.openssl.org/news/secadv/20191206.txtVendor Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2020.htmlPatch, Third Party Advisory
- https://www.tenable.com/security/tns-2019-09Third Party Advisory
- https://www.tenable.com/security/tns-2020-03Third Party Advisory
- https://www.tenable.com/security/tns-2020-11Third Party Advisory
- https://www.tenable.com/security/tns-2021-10Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00030.htmlMailing List, Third Party Advisory
- http://packetstormsecurity.com/files/155754/Slackware-Security-Advisory-openssl-Updates.htmlThird Party Advisory, VDB Entry
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=419102400a2811582a7a3d4a4e317d72e5ce0a8f
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=f1c5eea8a817075d31e43f5876993c6710238c98
- https://lists.debian.org/debian-lts-announce/2022/03/msg00023.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DDHOAATPWJCXRNFMJ2SASDBBNU5RJONY/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.