Detections
Analytics
EulerOS 2.0 SP11 : python-pyasn1 (EulerOS-SA-2026-4279)
high Nessus Plugin ID 364998
Synopsis
The remote EulerOS host is missing multiple security updates.Description
According to the versions of the python-pyasn1 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the univ.Real type converted its mantissa, base, and exponent value to a Python float using exact big-integer exponentiation. A BER, CER, or DER encoded REAL value only a few bytes long can carry a very large exponent, causing float conversion through prettyPrint(), str(), comparison, arithmetic, int(), or an explicit float() call to consume excessive CPU and memory and hang applications that decode untrusted ASN.1 data and then print, log, or compare decoded objects. This issue is fixed in version 0.6.4.(CVE-2026-59886)
pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the BER decoder shared by the CER and DER codecs parses long-form tags by accumulating continuation octets without an upper bound on the tag ID size, allowing a crafted input to force construction of an arbitrarily large integer with CPU cost growing quadratically and to trigger unhandled ValueError exceptions in Python 3.11+ error formatting paths. Any application decoding untrusted BER, CER, or DER input is affected. This issue is fixed in version 0.6.4.(CVE-2026-59884)
pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the BER, CER, and DER decoders process OBJECT IDENTIFIER and RELATIVE-OID values in quadratic time relative to the number of arcs, so a small crafted payload containing an OID with many arcs consumes excessive CPU per decode() call and can deny service to applications that decode untrusted ASN.1 data. The corresponding encoders have the same quadratic behavior when an application re-encodes previously decoded attacker-supplied values. This issue is fixed in version 0.6.4.(CVE-2026-59885)
Tenable has extracted the preceding description block directly from the EulerOS python-pyasn1 security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected python-pyasn1 packages.See Also
Plugin Details
Severity: High
ID: 364998
File Name: EulerOS_SA-2026-4279.nasl
Version: 1.1
Type: Local
Family: Huawei Local Security Checks
Published: 10/12/2026
Updated: 10/12/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3
Percentile: 23.73
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2026-59886
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:huawei:euleros:2.0, p-cpe:/a:huawei:euleros:python-pyasn1-help, p-cpe:/a:huawei:euleros:python3-pyasn1
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/EulerOS/release, Host/EulerOS/rpm-list, Host/EulerOS/sp
Excluded KB Items: Host/EulerOS/uvp_version
Exploit Ease: No known exploits are available
Patch Publication Date: 10/10/2026
Vulnerability Publication Date: 7/14/2026