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openSUSE-SU-2026:21241-1

Опубликовано: 06 июл. 2026
Источник: suse-cvrf

Описание

Security update for buildah

This update for buildah fixes the following issues

  • CVE-2026-39821: golang.org/x/net/idna: failure to reject ASCII-only Punycode-encoded labels allows for validation bypass and privilege escalation (bsc#1266648).
  • CVE-2026-39829: golang.org/x/crypto/ssh: pathological RSA/DSA parameters may cause DoS (bsc#1266191).
  • CVE-2026-39830: golang.org/x/crypto/ssh: client can cause server deadlock on unexpected responses (bsc#1266191).
  • CVE-2026-46598: golang.org/x/crypto/ssh: pathological inputs can lead to client panic/agent (bsc#1266191).

Список пакетов

openSUSE Leap 16.0
buildah-1.39.5-160000.2.1

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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
openSUSE Leap 16.0:buildah-1.39.5-160000.2.1
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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
openSUSE Leap 16.0:buildah-1.39.5-160000.2.1
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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
openSUSE Leap 16.0:buildah-1.39.5-160000.2.1
Ссылки

Описание

For certain crafted inputs, a 'ed25519.PrivateKey' was created by casting malformed wire bytes, leading to a panic when used.

Затронутые продукты
openSUSE Leap 16.0:buildah-1.39.5-160000.2.1
Ссылки