Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2024.1405
phpseclib security update
6 March 2024
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AusCERT Security Bulletin Summary
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Product: phpseclib
Publisher: Debian
Operating System: Debian GNU/Linux
Resolution: Patch/Upgrade
CVE Names: CVE-2024-27354 CVE-2024-27355 CVE-2023-27560
Original Bulletin:
https://lists.debian.org/debian-lts-announce/2024/03/msg00002.html
Comment: CVSS (Max): 7.5* CVE-2023-27560 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVSS Source: NIST
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* Not all CVSS available when published
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Debian LTS Advisory DLA-3749-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Guilhem Moulin
March 05, 2024 https://wiki.debian.org/LTS
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Package : phpseclib
Version : 1.0.19-3~deb10u3
CVE ID : CVE-2024-27354 CVE-2024-27355
Security issues were discovered in phpseclib, a PHP library for
arbitrary-precision integer arithmetic, which could lead to Denial of
Service.
CVE-2024-27354
An attacker can construct a malformed certificate containing an
extremely large prime to cause a denial of service (CPU consumption
for an `isPrime` primality check).
This issue was introduced when attempting to fix CVE-2023-27560.
CVE-2024-27355
When processing the ASN.1 object identifier of a certificate, a sub
identifier may be provided that leads to a denial of service (CPU
consumption for `decodeOID`).
For Debian 10 buster, these problems have been fixed in version
1.0.19-3~deb10u3.
We recommend that you upgrade your phpseclib packages.
For the detailed security status of phpseclib please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/phpseclib
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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