BusyBox httpd treats yescrypt ($y$) password hashes as plaintext during Basic Authentication, inverting the authentication check.

BusyBox httpd treats yescrypt ($y$) password hashes as plaintext during Basic Authentication, inverting the authentication check.

Affected: openEuler:24.03-LTS-SP3: busybox

The Swiss Army Knife of Embedded Linux Security Fix(es):

BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients.(CVE-2026-88831)

BusyBox romfs volume ID parsing uses unbounded strlen on attacker-controlled metadata, causing a heap buffer overflow when processing crafted filesystem images.(CVE-2026-88832)

A flaw was found in BusyBox's httpd web server. When configured with system password authentication, a user existence oracle may exist in certain build configurations. An attacker could distinguish existing from non-existing usernames by observing authentication failure behavior. Impact is limited to username enumeration and requires non-default compile options or uncommon password file states; default BusyBox builds with shadow password support are not affected.(CVE-2026-88834)

BusyBox dpkg read_package_field() steps past a NUL terminator on malformed .deb packages, causing an out-of-bounds heap read.(CVE-2026-88835)

BusyBox httpd treats yescrypt ($y$) password hashes as plaintext during Basic Authentication, inverting the authentication check.(CVE-2026-88837)

BusyBox passwd/group tokenize() references a stale endpoint pointer after trimming, causing an out-of-bounds write of heap pointers.(CVE-2026-88839)

A flaw was found in BusyBox dpkg. The write_status_file() function does not reset a field cursor between package stanzas. When two packages are removed in a single invoca…

busybox-1.38.0-3.1 on GA media

busybox: busybox: httpd silently fails open when IP deny rules contain invalid CIDR prefix lengths busybox: busybox: romfs volume ID parsing performs unbounded memcpy into fixed-size label buffer, causing heap overflow busybox: busybox: dpkg read_package_field() steps past NUL terminator, causing out-of-bounds read on malformed .deb packages busybox: busybox: httpd misidentifies yescrypt password hashes as plaintext, inverting authentication busybox: busybox: passwd/group parser writes heap pointers out of bounds due to stale tokenize() endpoint

Security update for busybox

Affected: Ubuntu:Pro:14.04:LTS: busybox, Ubuntu:Pro:16.04:LTS: busybox, Ubuntu:Pro:18.04:LTS: busybox, Ubuntu:20.04:LTS: busybox, Ubuntu:22.04:LTS: busybox, Ubuntu:24.04:LTS: busybox, Ubuntu:26.10: busybox, Ubuntu:26.04:LTS: busybox

BusyBox httpd treats yescrypt ($y$) password hashes as plaintext during Basic Authentication, inverting the authentication check.