CVE-2016-0777

Description

The resend_bytes function in roaming_common.c in the client in OpenSSH 5.x, 6.x, and 7.x before 7.1p2 allows remote servers to obtain sensitive information from process memory by requesting transmission of an entire buffer, as demonstrated by reading a private key.

Gravité et risque d'exploitation

CVE-2016-0777 obtient un score CVSS de 6.5/10, soit une gravité moyenne. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 63.47 %, ce qui la place devant 99.2 % des CVE référencées.

Que faire ?

• Vérifiez si le produit concerné est présent sur votre parc.
• Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
• À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
• Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

• https://blogs.sophos.com/2016/02/17/utm-up2date-9-354-released/
• http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00006.html
• https://blogs.sophos.com/2016/02/29/utm-up2date-9-319-released/
• http://lists.apple.com/archives/security-announce/2016/Mar/msg00004.html
• https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05247375
• http://www.securityfocus.com/archive/1/537295/100/0/threaded
• https://support.apple.com/HT206167
• http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176349.html
• http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10734
• http://www.securityfocus.com/bid/80695
• https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05385680
• https://security.FreeBSD.org/advisories/FreeBSD-SA-16:07.openssh.asc
• http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175676.html
• http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
• http://www.openssh.com/txt/release-7.1p2
• http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00014.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176516.html
• https://bto.bluecoat.com/security-advisory/sa109
• http://www.securitytracker.com/id/1034671
• http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00013.html
• https://security.gentoo.org/glsa/201601-01
• https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722
• http://www.openwall.com/lists/oss-security/2016/01/14/7
• http://seclists.org/fulldisclosure/2016/Jan/44
• http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00008.html
• http://packetstormsecurity.com/files/135273/Qualys-Security-Advisory-OpenSSH-Overflow-Leak.html
• http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00007.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175592.html
• http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00009.html
• http://www.ubuntu.com/usn/USN-2869-1
• https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05356388
• http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
• http://www.debian.org/security/2016/dsa-3446
• https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf