e1c7040ec9
Backport upstream commit f08ab2f4d7d2 to fix CVE-2026-47162,
a code injection vulnerability in netrw's NetrwBookHistSave()
function. The fix replaces unsafe string concatenation with
the string() function for safe quoting of directory names
when saving bookmark history. A new test file
(test_plugin_netrw.vim) is included to verify the fix.
CVE: CVE-2026-47162
Upstream patches:
- f08ab2f4d7.patch
Resolves: RHEL-186663
This commit was backported by Ymir, a Red Hat Enterprise Linux software maintenance AI agent.
Assisted-by: Ymir
85 lines
3.1 KiB
Diff
85 lines
3.1 KiB
Diff
From 191a038d82f12d4d55a42c505bf3faa10c22fbe4 Mon Sep 17 00:00:00 2001
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From: Christian Brabandt <cb@256bit.org>
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Date: Sun, 17 May 2026 18:53:48 +0000
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Subject: [PATCH] patch 9.2.0495: [security]: runtime(netrw): code injection
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via NetrwBookHistSave()
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Problem: [security]: runtime(netrw): code injection via
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NetrwBookHistSave()
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Solution: Properly quote the directory name using string() function
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(Srinivas Piskala Ganesh Babu)
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Github Security Advisory:
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https://github.com/vim/vim/security/advisories/GHSA-crm5-rh6j-2c7c
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Signed-off-by: Christian Brabandt <cb@256bit.org>
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---
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runtime/autoload/netrw.vim | 2 +-
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src/testdir/Make_all.mak | 2 ++
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src/testdir/test_plugin_netrw.vim | 23 +++++++++++++++++++++++
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3 files changed, 26 insertions(+), 1 deletion(-)
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create mode 100644 src/testdir/test_plugin_netrw.vim
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diff --git a/runtime/autoload/netrw.vim b/runtime/autoload/netrw.vim
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index 47575ef90..f7a44f35c 100644
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--- a/runtime/autoload/netrw.vim
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+++ b/runtime/autoload/netrw.vim
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@@ -3803,7 +3803,7 @@ fun! s:NetrwBookHistSave()
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while ( first || cnt != g:netrw_dirhistcnt )
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let lastline= lastline + 1
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if exists("g:netrw_dirhist_{cnt}")
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- call setline(lastline,'let g:netrw_dirhist_'.cnt."='".g:netrw_dirhist_{cnt}."'")
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+ call setline(lastline,'let g:netrw_dirhist_'.cnt.'='.string(g:netrw_dirhist_{cnt}))
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" call Decho("..".lastline.'let g:netrw_dirhist_'.cnt."='".g:netrw_dirhist_{cnt}."'",'~'.expand("<slnum>"))
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endif
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let first = 0
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diff --git a/src/testdir/Make_all.mak b/src/testdir/Make_all.mak
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index 2b3d16d78..2ed089f98 100644
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--- a/src/testdir/Make_all.mak
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+++ b/src/testdir/Make_all.mak
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@@ -229,6 +229,7 @@ NEW_TESTS = \
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test_perl \
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test_plugin_ccomplete \
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+ test_plugin_netrw \
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test_plugin_phpcomplete \
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test_plugin_tar \
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test_plus_arg_edit \
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test_popup \
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@@ -482,6 +483,7 @@ NEW_TESTS_RES = \
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test_perl.res \
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test_plugin_ccomplete.res \
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+ test_plugin_netrw.res \
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test_plugin_phpcomplete.res \
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test_plugin_tar.res \
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test_plus_arg_edit.res \
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test_popup.res \
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diff --git a/src/testdir/test_plugin_netrw.vim b/src/testdir/test_plugin_netrw.vim
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new file mode 100644
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index 000000000..e9d771078
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--- /dev/null
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+++ b/src/testdir/test_plugin_netrw.vim
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@@ -0,0 +1,23 @@
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+" Tests for the netrw plugin
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+
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+func Test_netrw_injection()
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+ let g:netrw_home = getcwd()
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+ let savefile = g:netrw_home . '/.netrwhist'
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+ let g:netrw_dirhistmax = 10
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+ let g:netrw_dirhistcnt = 1
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+ let g:netrw_dirhist_1 = "x'|let g:injected = 1|let y='z"
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+ call delete(savefile)
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+ try
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+ call netrw#Call('NetrwBookHistSave')
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+ call assert_true(filereadable(savefile), savefile . ' must be written')
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+ unlet g:netrw_dirhist_1
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+ execute 'source ' . fnameescape(savefile)
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+ call assert_false(exists("g:injected"), 'injected statement must not execute')
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+ call assert_equal("x'|let g:injected = 1|let y='z", g:netrw_dirhist_1, 'dirname must round-trip')
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+ finally
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+ call delete(savefile)
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+ unlet! g:netrw_home g:netrw_dirhistmax g:netrw_dirhistcnt g:netrw_dirhist_1 g:injected
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+ endtry
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+endfunc
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+
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+" vim:ts=8 sts=2 sw=2 et
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