Hi,

Le Sun, Apr 19, 2026 at 12:45:36PM +0200, David Prévot a écrit :
[…]
> [ This bug report is similar to #1134372 for php-seclib3 ]
> 
> I’d like to get CVE-2026-40194 fixed in an upcoming point release.

I’d like to also add an additional CVE-2024-27355 workaround as recently
published upstream (just a max length change for an ID).

The change is pretty trivial.

[ Checklist ]
  [x] *all* changes are documented in the d/changelog
  [x] I reviewed all changes and I approve them
  [x] attach debdiff against the package in (old)stable
  [x] the issue is verified as fixed in unstable

Regards,

taffit
diff -Nru phpseclib-1.0.23/debian/changelog phpseclib-1.0.23/debian/changelog
--- phpseclib-1.0.23/debian/changelog	2026-04-19 11:36:32.000000000 +0200
+++ phpseclib-1.0.23/debian/changelog	2026-04-28 13:51:31.000000000 +0200
@@ -1,3 +1,10 @@
+phpseclib (1.0.23-6+deb13u3) trixie; urgency=medium
+
+  * ASN1: reduce length of supported OIDs from 4096 bytes to 128 bytes
+    [CVE-2024-27355]
+
+ -- David Prévot <[email protected]>  Tue, 28 Apr 2026 13:51:31 +0200
+
 phpseclib (1.0.23-6+deb13u2) trixie; urgency=medium
 
   * Fix bug number in previous changelog entry
diff -Nru phpseclib-1.0.23/debian/patches/0015-ASN1-reduce-length-of-supported-OIDs-from-4096-bytes.patch phpseclib-1.0.23/debian/patches/0015-ASN1-reduce-length-of-supported-OIDs-from-4096-bytes.patch
--- phpseclib-1.0.23/debian/patches/0015-ASN1-reduce-length-of-supported-OIDs-from-4096-bytes.patch	1970-01-01 01:00:00.000000000 +0100
+++ phpseclib-1.0.23/debian/patches/0015-ASN1-reduce-length-of-supported-OIDs-from-4096-bytes.patch	2026-04-28 13:51:15.000000000 +0200
@@ -0,0 +1,26 @@
+From: terrafrost <[email protected]>
+Date: Mon, 27 Apr 2026 01:00:37 -0500
+Subject: ASN1: reduce length of supported OIDs from 4096 bytes to 128 bytes
+
+Origin: upstream, https://github.com/phpseclib/phpseclib/commit/d53d2021bcb9f6a04d5d44ec99e6bbef219a71bc
+Bug: https://github.com/phpseclib/phpseclib/security/advisories/GHSA-2528-jw5q-ww88
+Bug-Debian: https://security-tracker.debian.org/tracker/CVE-2024-27355
+---
+ phpseclib/File/ASN1.php | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/phpseclib/File/ASN1.php b/phpseclib/File/ASN1.php
+index 249a37d..34ad9ee 100644
+--- a/phpseclib/File/ASN1.php
++++ b/phpseclib/File/ASN1.php
+@@ -1278,8 +1278,8 @@ class File_ASN1
+         $pos = 0;
+         $len = strlen($content);
+         // see https://github.com/openjdk/jdk/blob/2deb318c9f047ec5a4b160d66a4b52f93688ec42/src/java.base/share/classes/sun/security/util/ObjectIdentifier.java#L55
+-        if ($len > 4096) {
+-            //user_error('Object Identifier size is limited to 4096 bytes');
++        if ($len > 128) {
++            //user_error('Object Identifier size is limited to 128 bytes');
+             return false;
+         }
+ 
diff -Nru phpseclib-1.0.23/debian/patches/series phpseclib-1.0.23/debian/patches/series
--- phpseclib-1.0.23/debian/patches/series	2026-04-19 11:36:32.000000000 +0200
+++ phpseclib-1.0.23/debian/patches/series	2026-04-28 13:51:15.000000000 +0200
@@ -12,3 +12,4 @@
 0012-Modernize-PHPUnit-syntax.patch
 0013-make-unpadding-constant-time.patch
 0014-SSH2-use-constant-time-string-comparison-in-get_bina.patch
+0015-ASN1-reduce-length-of-supported-OIDs-from-4096-bytes.patch

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