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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.3473 golang-go.crypto security update 8 October 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: golang-go.crypto Publisher: Debian Operating System: Debian GNU/Linux 8 Impact/Access: Denial of Service -- Remote/Unauthenticated Provide Misleading Information -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2020-9283 CVE-2019-11841 CVE-2019-11840 Reference: ESB-2020.3257 ESB-2020.2792 Original Bulletin: https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 - - ------------------------------------------------------------------------- Debian LTS Advisory DLA-2402-1 debian-lts@lists.debian.org https://www.debian.org/lts/security/ Brian May October 08, 2020 https://wiki.debian.org/LTS - - ------------------------------------------------------------------------- Package : golang-go.crypto Version : 1:0.0~git20170407.0.55a552f+REALLY.0.0~git20161012.0.5f31782-1+deb8u1 CVE ID : CVE-2019-11840 CVE-2019-11841 CVE-2020-9283 CVE-2019-11840 An issue was discovered in supplementary Go cryptography libraries, aka golang-googlecode-go-crypto. If more than 256 GiB of keystream is generated, or if the counter otherwise grows greater than 32 bits, the amd64 implementation will first generate incorrect output, and then cycle back to previously generated keystream. Repeated keystream bytes can lead to loss of confidentiality in encryption applications, or to predictability in CSPRNG applications. CVE-2019-11841 A message-forgery issue was discovered in crypto/openpgp/clearsign/clearsign.go in supplementary Go cryptography libraries. The "Hash" Armor Header specifies the message digest algorithm(s) used for the signature. Since the library skips Armor Header parsing in general, an attacker can not only embed arbitrary Armor Headers, but also prepend arbitrary text to cleartext messages without invalidating the signatures. CVE-2020-9283 golang.org/x/crypto allows a panic during signature verification in the golang.org/x/crypto/ssh package. A client can attack an SSH server that accepts public keys. Also, a server can attack any SSH client. For Debian 9 stretch, these problems have been fixed in version 1:0.0~git20170407.0.55a552f+REALLY.0.0~git20161012.0.5f31782-1+deb8u1. We recommend that you upgrade your golang-go.crypto packages. For the detailed security status of golang-go.crypto please refer to its security tracker page at: https://security-tracker.debian.org/tracker/golang-go.crypto Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS - -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEKpwfR8DOwu5vyB4TKpJZkldkSvoFAl9+OCsACgkQKpJZkldk SvpsyQ/6AjE2foemSU+ybWNpRIPdz8/10n1xYAq22/aInfR/CwlfrhU1+3939jAi d/9nFDl69XHgETnnT0nd6RNXHN279Ecwev31816O9ndVu6POtrbm5Pnwoay7EWou vcqiY3zxrkjrlO95lVzUA+va0hTx3RP76AzPKsF16frH9HkAQB+tdJRurj8VWJuy 79P+/fLJdrFr50yjQS4CIgh63YWLIi+YNkCxphavZsnrqLBgv8eWCR9tD7zdcQq/ IdrwB0PSdpiqVtwtka/xLvyQC11UmLDH+TDDxXRXnLzIxNEzUPeuc8JSMFo44315 XY/9xjsLgf+WmJ19HrjoBavqN1xhFiLRAzvqMQA3OR+IbDuQacBylrn4XbVWwPzh 1vSi0F2EIvV0901W9Tk0d0L0cn3O+QLh54V6Z2ZWYBgdRO9SY787VULXnR9Dw1ib z0Th3b1HG3n7GfhV/MF9pbinNeqSxiqZqG15FA3PVVlNs3stXw52NkBMehf1RN9J r5rL5fJvHuHQVuXJIDjq4HE7x2hcCQVTRdfiMriW/4wynwts3+b8S6AxjW+/5pBy WZi05GjgZsay+mi9uayDfVylruTDWvyg3bJ6YgqrtY7MEi2xkaERi/xM/OnVl7qy sYVNGfgMkRLOon/5VZ6kqKnOUU12m/gmQprw0Lo+UHLhz9VbO9g= =epyk - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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