Debian Security Advisory
DSA-4855-1 openssl -- security update
- Date Reported:
- 17 Feb 2021
- Affected Packages:
- Security database references:
- In the Debian bugtracking system: Bug 947949.
In Mitre's CVE dictionary: CVE-2019-1551, CVE-2021-23840, CVE-2021-23841.
- More information:
Multiple vulnerabilities have been discovered in OpenSSL, a Secure Sockets Layer toolkit. An overflow bug in the x64_64 Montgomery squaring procedure, an integer overflow in CipherUpdate and a NULL pointer dereference flaw X509_issuer_and_serial_hash() were found, which could result in denial of service.
Additional details can be found in the upstream advisories https://www.openssl.org/news/secadv/20191206.txt and https://www.openssl.org/news/secadv/20210216.txt.
For the stable distribution (buster), these problems have been fixed in version 1.1.1d-0+deb10u5.
We recommend that you upgrade your openssl packages.
For the detailed security status of openssl please refer to its security tracker page at: https://security-tracker.debian.org/tracker/openssl