OESA-2026-2903

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-2903
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-2903.json
JSON Data
https://api.osv.dev/v1/vulns/OESA-2026-2903
Upstream
Published
2026-07-09T12:49:55Z
Modified
2026-07-09T13:00:11.698495568Z
Summary
pam security update
Details

PAM (Pluggable Authentication Modules) is a system of libraries that handle the authentication tasks of applications (services) on the system.

Security Fix(es):

Linux-PAM through 1.7.2 contains an observable timing discrepancy (CWE-208) in the pamuserdb module's plaintext-password comparison path in modules/pamuserdb/pamuserdb.c that allows a local or network-adjacent attacker able to repeatedly drive authentication through a calling service to recover the plaintext password of a target account by measuring response-timing differences. The comparison uses strncmp() (or strncasecmp() when PAMICASEARG is set) preceded by a length-equality check, so the time to reject a candidate depends on the index of the first differing byte and on whether the candidate's length matches the stored password, leaking the password length and individual prefix bytes. The vulnerable path is reached when the administrator configures pamuserdb with crypt=none, with an unrecognized crypt method, or without a crypt= argument, causing the module to store and compare credentials in plaintext.(CVE-2026-54411)

Database specific 
{
    "severity": "Medium"
}
References

Affected packages

openEuler:24.03-LTS-SP3 / pam

Package

Name
pam
Purl
pkg:rpm/openEuler/pam&distro=openEuler-24.03-LTS-SP3

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.5.3-12.oe2403sp3

Ecosystem specific 

{
    "x86_64": [
        "pam-1.5.3-12.oe2403sp3.x86_64.rpm",
        "pam-debuginfo-1.5.3-12.oe2403sp3.x86_64.rpm",
        "pam-debugsource-1.5.3-12.oe2403sp3.x86_64.rpm",
        "pam-devel-1.5.3-12.oe2403sp3.x86_64.rpm"
    ],
    "src": [
        "pam-1.5.3-12.oe2403sp3.src.rpm"
    ],
    "aarch64": [
        "pam-1.5.3-12.oe2403sp3.aarch64.rpm",
        "pam-debuginfo-1.5.3-12.oe2403sp3.aarch64.rpm",
        "pam-debugsource-1.5.3-12.oe2403sp3.aarch64.rpm",
        "pam-devel-1.5.3-12.oe2403sp3.aarch64.rpm"
    ],
    "noarch": [
        "pam-help-1.5.3-12.oe2403sp3.noarch.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-2903.json"