CVE-2016-20012
published 2021-09-15CVE-2016-20012: OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain combination of username and public key is known to an SSH server, to test…
PriorityP333medium5.3CVSS 3.1
AVNACLPRNUINSUCLINAN
EPSS
5.04%
91.2th percentile
OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain combination of username and public key is known to an SSH server, to test whether this suspicion is correct. This occurs because a challenge is sent only when that combination could be valid for a login session. NOTE: the vendor does not recognize user enumeration as a vulnerability for this product
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | openssh | — | — |
| msrc | cm1_openssh_8.8p1-1_on_cbl_mariner_1.0 | — | — |
| openbsd | openssh | <= 8.7 | — |
| paloalto | prisma_sd | — | — |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:P/I:N/A:N
osv5.3MEDIUM
vendor_debian5.3LOW
vendor_msrc5.3MEDIUM
vendor_redhat5.3MEDIUM
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Palo Alto
PAN-SA-2024-0003 Informational Bulletin: Impact of OSS CVEs in Prisma SD-WAN ION
vendor_paloalto·2024-04-05·CVSS 4.3
CVE-2007-2768 [MEDIUM] PAN-SA-2024-0003 Informational Bulletin: Impact of OSS CVEs in Prisma SD-WAN ION
PAN-SA-2024-0003 Informational Bulletin: Impact of OSS CVEs in Prisma SD-WAN ION
The Palo Alto Networks Product Security Assurance team has evaluated the following open source software (OSS) CVEs as they relate to Prisma SD-WAN ION. While Prisma SD-WAN ION may include the
CVEs: CVE-2007-2768, CVE-2016-10010, CVE-2016-10011, CVE-2016-10012, CVE-2016-20012, CVE-2016-8858, CVE-2019-6109, CVE-2019-6110, CVE-2019-6111, CVE-2020-12062, CVE-2021-41617, CVE-2022-4450, CVE-2023-0215, CVE-2023-0286, CVE-2023-28531, CVE-2023-38408, CVE-2023-51384, CVE-2023-51385, CVE-2023-51767
Affected products: Prisma SD
Microsoft
OpenSSH through 8.7 allows remote attackers who have a suspicion that a certain combination of username and public key is known to an SSH server to test whether this suspicion is correct. This occurs
vendor_msrc·2021-09-14·CVSS 5.3
CVE-2016-20012 [MEDIUM] OpenSSH through 8.7 allows remote attackers who have a suspicion that a certain combination of username and public key is known to an SSH server to test whether this suspicion is correct. This occurs
OpenSSH through 8.7 allows remote attackers who have a suspicion that a certain combination of username and public key is known to an SSH server to test whether this suspicion is correct. This occurs because a challenge is sent only when that combination could be valid for a login session. NOTE: the vendor does not recognize user enumeration as a vulnerability for this product
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency
Red Hat
openssh: Public key information leak
vendor_redhat·2016-02-07·CVSS 5.3
CVE-2016-20012 [MEDIUM] CWE-200 openssh: Public key information leak
openssh: Public key information leak
OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain combination of username and public key is known to an SSH server, to test whether this suspicion is correct. This occurs because a challenge is sent only when that combination could be valid for a login session. NOTE: the vendor does not recognize user enumeration as a vulnerability for this product
Statement: Although a CVE was assigned upstream and Red Hat doesn't consider it to be a security flaw and won't receive any patch, also the CVE was made as disputed by MITRE. Considering that Red Hat is closing this flaw as NOTABUG.
Package: openssh (Red Hat Enterprise Linux 6) - Not affected
Package: openssh (Red Hat Enterprise Linux 7) - Not affected
Package: openssh (Red
Debian
CVE-2016-20012: openssh - OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain...
vendor_debian·2016·CVSS 5.3
CVE-2016-20012 [MEDIUM] CVE-2016-20012: openssh - OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain...
OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain combination of username and public key is known to an SSH server, to test whether this suspicion is correct. This occurs because a challenge is sent only when that combination could be valid for a login session. NOTE: the vendor does not recognize user enumeration as a vulnerability for this product
Scope: local
bookworm: open
bullseye: open
forky: open
sid: open
trixie: open
GHSA
GHSA-84j4-ccmw-hwpg: OpenSSH through 8
ghsa_unreviewed·2022-05-24
CVE-2016-20012 [MEDIUM] GHSA-84j4-ccmw-hwpg: OpenSSH through 8
OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain combination of username and public key is known to an SSH server, to test whether this suspicion is correct. This occurs because a challenge is sent only when that combination could be valid for a login session.
OSV
CVE-2016-20012: OpenSSH through 8
osv·2021-09-15·CVSS 5.3
CVE-2016-20012 [MEDIUM] CVE-2016-20012: OpenSSH through 8
OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain combination of username and public key is known to an SSH server, to test whether this suspicion is correct. This occurs because a challenge is sent only when that combination could be valid for a login session. NOTE: the vendor does not recognize user enumeration as a vulnerability for this product
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/openssh/openssh-portable/blob/d0fffc88c8fe90c1815c6f4097bc8cbcabc0f3dd/auth2-pubkey.c#L261-L265https://github.com/openssh/openssh-portable/pull/270https://github.com/openssh/openssh-portable/pull/270#issuecomment-920577097https://github.com/openssh/openssh-portable/pull/270#issuecomment-943909185https://rushter.com/blog/public-ssh-keys/https://security.netapp.com/advisory/ntap-20211014-0005/https://utcc.utoronto.ca/~cks/space/blog/tech/SSHKeysAreInfoLeakhttps://www.openwall.com/lists/oss-security/2018/08/24/1https://github.com/openssh/openssh-portable/blob/d0fffc88c8fe90c1815c6f4097bc8cbcabc0f3dd/auth2-pubkey.c#L261-L265https://github.com/openssh/openssh-portable/pull/270https://github.com/openssh/openssh-portable/pull/270#issuecomment-920577097https://github.com/openssh/openssh-portable/pull/270#issuecomment-943909185https://rushter.com/blog/public-ssh-keys/https://security.netapp.com/advisory/ntap-20211014-0005/https://utcc.utoronto.ca/~cks/space/blog/tech/SSHKeysAreInfoLeakhttps://www.openwall.com/lists/oss-security/2018/08/24/1https://github.com/openssh/openssh-portable/blob/d0fffc88c8fe90c1815c6f4097bc8cbcabc0f3dd/auth2-pubkey.c#L261-L265
2021-09-15
Published