ID CVE-2019-1543
Summary ChaCha20-Poly1305 is an AEAD cipher, and requires a unique nonce input for every encryption operation. RFC 7539 specifies that the nonce value (IV) should be 96 bits (12 bytes). OpenSSL allows a variable nonce length and front pads the nonce with 0 bytes if it is less than 12 bytes. However it also incorrectly allows a nonce to be set of up to 16 bytes. In this case only the last 12 bytes are significant and any additional leading bytes are ignored. It is a requirement of using this cipher that nonce values are unique. Messages encrypted using a reused nonce value are susceptible to serious confidentiality and integrity attacks. If an application changes the default nonce length to be longer than 12 bytes and then makes a change to the leading bytes of the nonce expecting the new value to be a new unique nonce then such an application could inadvertently encrypt messages with a reused nonce. Additionally the ignored bytes in a long nonce are not covered by the integrity guarantee of this cipher. Any application that relies on the integrity of these ignored leading bytes of a long nonce may be further affected. Any OpenSSL internal use of this cipher, including in SSL/TLS, is safe because no such use sets such a long nonce value. However user applications that use this cipher directly and set a non-default nonce length to be longer than 12 bytes may be vulnerable. OpenSSL versions 1.1.1 and 1.1.0 are affected by this issue. Due to the limited scope of affected deployments this has been assessed as low severity and therefore we are not creating new releases at this time. Fixed in OpenSSL 1.1.1c (Affected 1.1.1-1.1.1b). Fixed in OpenSSL 1.1.0k (Affected 1.1.0-1.1.0j).
References
Vulnerable Configurations
  • cpe:2.3:a:openssl:openssl:1.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0:-:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0:-:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0:pre1:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0:pre1:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0:pre2:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0:pre2:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0:pre3:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0:pre3:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0:pre4:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0:pre4:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0:pre5:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0:pre5:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0:pre6:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0:pre6:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0a:*:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0a:*:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0b:*:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0b:*:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0c:*:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0c:*:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0d:*:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0d:*:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0e:*:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0e:*:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0f:*:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0f:*:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0g:*:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0g:*:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0h:*:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0h:*:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0i:*:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0i:*:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.0j:*:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.0j:*:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.1:pre1:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.1:pre1:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.1:pre2:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.1:pre2:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.1:pre3:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.1:pre3:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.1:pre4:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.1:pre4:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.1:pre5:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.1:pre5:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.1:pre6:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.1:pre6:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.1:pre7:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.1:pre7:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.1:pre8:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.1:pre8:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.1:pre9:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.1:pre9:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.1a:*:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.1a:*:*:*:*:*:*:*
  • cpe:2.3:a:openssl:openssl:1.1.1b:*:*:*:*:*:*:*
    cpe:2.3:a:openssl:openssl:1.1.1b:*:*:*:*:*:*:*
CVSS
Base: 5.8 (as of 03-06-2019 - 20:29)
Impact:
Exploitability:
CWE CWE-310
CAPEC
  • Signature Spoofing by Key Recreation
    An attacker obtains an authoritative or reputable signer's private signature key by exploiting a cryptographic weakness in the signature algorithm or pseudorandom number generation and then uses this key to forge signatures from the original signer to mislead a victim into performing actions that benefit the attacker.
Access
VectorComplexityAuthentication
NETWORK MEDIUM NONE
Impact
ConfidentialityIntegrityAvailability
PARTIAL PARTIAL NONE
cvss-vector via4 AV:N/AC:M/Au:N/C:P/I:P/A:N
redhat via4
advisories
bugzilla
id 1714245
title DSA ciphers in TLS don't work with SHA-1 signatures even in LEGACY level
oval
OR
  • comment Red Hat Enterprise Linux must be installed
    oval oval:com.redhat.rhba:tst:20070304026
  • AND
    • comment Red Hat Enterprise Linux 8 is installed
      oval oval:com.redhat.rhba:tst:20193384074
    • OR
      • AND
        • comment openssl is earlier than 1:1.1.1c-2.el8
          oval oval:com.redhat.rhsa:tst:20193700001
        • comment openssl is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhba:tst:20171929002
      • AND
        • comment openssl-debugsource is earlier than 1:1.1.1c-2.el8
          oval oval:com.redhat.rhsa:tst:20193700003
        • comment openssl-debugsource is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20193700004
      • AND
        • comment openssl-devel is earlier than 1:1.1.1c-2.el8
          oval oval:com.redhat.rhsa:tst:20193700005
        • comment openssl-devel is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhba:tst:20171929004
      • AND
        • comment openssl-libs is earlier than 1:1.1.1c-2.el8
          oval oval:com.redhat.rhsa:tst:20193700007
        • comment openssl-libs is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhba:tst:20171929006
      • AND
        • comment openssl-perl is earlier than 1:1.1.1c-2.el8
          oval oval:com.redhat.rhsa:tst:20193700009
        • comment openssl-perl is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhba:tst:20171929008
rhsa
id RHSA-2019:3700
released 2019-11-05
severity Low
title RHSA-2019:3700: openssl security, bug fix, and enhancement update (Low)
rpms
  • openssl-1:1.1.1c-2.el8
  • openssl-debuginfo-1:1.1.1c-2.el8
  • openssl-debugsource-1:1.1.1c-2.el8
  • openssl-devel-1:1.1.1c-2.el8
  • openssl-libs-1:1.1.1c-2.el8
  • openssl-libs-debuginfo-1:1.1.1c-2.el8
  • openssl-perl-1:1.1.1c-2.el8
refmap via4
bugtraq 20190701 [SECURITY] [DSA 4475-1] openssl security update
confirm
debian DSA-4475
fedora
  • FEDORA-2019-00c25b9379
  • FEDORA-2019-9a0a7c0986
misc
suse openSUSE-SU-2019:1814
Last major update 03-06-2019 - 20:29
Published 06-03-2019 - 21:29
Last modified 03-06-2019 - 20:29
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