Описание
Security update for mcphost
This update for mcphost fixes the following issues
- CVE-2026-25680,CVE-2026-25681,CVE-2026-27136,CVE-2026-42502,CVE-2026-42506: golang.org/x/net/html: multiple issues when parsing HTML files (bsc#1267109).
- CVE-2026-33814: golang.org/x/net/http2: infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE (bsc#1265730).
- CVE-2026-39821: golang.org/x/net/idna: failure to reject ASCII-only Punycode-encoded labels allows for validation bypass and privilege escalation (bsc#1266572).
- CVE-2026-39827: Invoking memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh (bsc#1266145).
- CVE-2026-39828: Invoking bypass of certificate restrictions in golang.org/x/crypto/ssh (bsc#1266145).
- CVE-2026-39829: Invoking pathological RSA/DSA parameters may cause DoS in golang.org/x/crypto/ssh (bsc#1266145).
- CVE-2026-39830: Invoking client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh (bsc#1266145).
- CVE-2026-39831: Invoking bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh (bsc#1266145).
- CVE-2026-39832: Invoking agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent (bsc#1266145).
- CVE-2026-39833: Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent (bsc#1266145).
- CVE-2026-39834: Invoking infinite loop on large channel writes in golang.org/x/crypto/ssh (bsc#1266145).
- CVE-2026-39835: Invoking server panic during CheckHostKey/Authenticate in golang.org/x/crypto/ssh (bsc#1266145).
- CVE-2026-42508: Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts (bsc#1266145).
- CVE-2026-46595: Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ssh (bsc#1266145).
- CVE-2026-46597: Invoking byte arithmetic causes underflow and panic in golang.org/x/crypto/ssh (bsc#1266145).
- CVE-2026-46598: Invoking pathological inputs can lead to client panic in golang.org/x/crypto/ssh/agent (bsc#1266145).
Список пакетов
openSUSE Leap 16.0
Ссылки
- SUSE Security Ratings
- SUSE Bug 1265730
- SUSE Bug 1266145
- SUSE Bug 1266572
- SUSE Bug 1267109
- SUSE CVE CVE-2026-25680 page
- SUSE CVE CVE-2026-25681 page
- SUSE CVE CVE-2026-27136 page
- SUSE CVE CVE-2026-33814 page
- SUSE CVE CVE-2026-39821 page
- SUSE CVE CVE-2026-39827 page
- SUSE CVE CVE-2026-39828 page
- SUSE CVE CVE-2026-39829 page
- SUSE CVE CVE-2026-39830 page
- SUSE CVE CVE-2026-39831 page
- SUSE CVE CVE-2026-39832 page
- SUSE CVE CVE-2026-39833 page
- SUSE CVE CVE-2026-39834 page
- SUSE CVE CVE-2026-39835 page
- SUSE CVE CVE-2026-42502 page
Описание
Parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.
Затронутые продукты
Ссылки
- CVE-2026-25680
- SUSE Bug 1267044
Описание
Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Затронутые продукты
Ссылки
- CVE-2026-25681
- SUSE Bug 1267044
Описание
Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Затронутые продукты
Ссылки
- CVE-2026-27136
- SUSE Bug 1267044
Описание
When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0.
Затронутые продукты
Ссылки
- CVE-2026-33814
- SUSE Bug 1264506
- SUSE Bug 1268758
Описание
The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode("xn--example-.com") incorrectly returns the name "example.com" rather than an error. This behavior can lead to privilege escalation in programs using the idna package. For example, a program which performs privilege checks on the ASCII hostname may reject "example.com" but permit "xn--example-.com". If that program subsequently converts the ASCII hostname to Unicode, it will inadvertently permits access to the Unicode name "example.com".
Затронутые продукты
Ссылки
- CVE-2026-39821
- SUSE Bug 1266474
Описание
An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.
Затронутые продукты
Ссылки
- CVE-2026-39827
- SUSE Bug 1266049
Описание
When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil Permissions with PartialSuccessError now results in a connection error.
Затронутые продукты
Ссылки
- CVE-2026-39828
- SUSE Bug 1266049
Описание
The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This could be triggered by unauthenticated clients during public key authentication. RSA moduli are now limited to 8192 bits, and DSA parameters are validated per FIPS 186-2.
Затронутые продукты
Ссылки
- CVE-2026-39829
- SUSE Bug 1266049
Описание
A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.
Затронутые продукты
Ссылки
- CVE-2026-39830
- SUSE Bug 1266049
Описание
The Verify() method for FIDO/U2F security key types (sk-ecdsa-sha2-nistp256@openssh.com, sk-ssh-ed25519@openssh.com) did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior, return a "no-touch-required" extension in Permissions.Extensions from PublicKeyCallback.
Затронутые продукты
Ссылки
- CVE-2026-39831
- SUSE Bug 1266049
Описание
When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.
Затронутые продукты
Ссылки
- CVE-2026-39832
- SUSE Bug 1266049
Описание
The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring() now returns an error when unsupported constraints are requested.
Затронутые продукты
Ссылки
- CVE-2026-39833
- SUSE Bug 1266049
Описание
When writing data larger than 4GB in a single Write call on an SSH channel, an integer overflow in the internal payload size calculation caused the write loop to spin indefinitely, sending empty packets without making progress. The size comparison now uses int64 to prevent truncation.
Затронутые продукты
Ссылки
- CVE-2026-39834
- SUSE Bug 1266049
Описание
SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil.
Затронутые продукты
Ссылки
- CVE-2026-39835
- SUSE Bug 1266049
Описание
Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Затронутые продукты
Ссылки
- CVE-2026-42502
- SUSE Bug 1267044
Описание
Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Затронутые продукты
Ссылки
- CVE-2026-42506
- SUSE Bug 1267044
Описание
Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation. Now, both the 'key' and 'key.SignatureKey' are checked for @revoked.
Затронутые продукты
Ссылки
- CVE-2026-42508
- SUSE Bug 1266049
Описание
Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of callback is passed other than public key, then the source-address validation would be skipped.
Затронутые продукты
Ссылки
- CVE-2026-46595
- SUSE Bug 1266049
Описание
An incorrectly placed cast from bytes to int allowed for server-side panic in the AES-GCM packet decoder for well-crafted inputs.
Затронутые продукты
Ссылки
- CVE-2026-46597
- SUSE Bug 1266049
Описание
For certain crafted inputs, a 'ed25519.PrivateKey' was created by casting malformed wire bytes, leading to a panic when used.
Затронутые продукты
Ссылки
- CVE-2026-46598
- SUSE Bug 1266049