Adding fix for CVE-2021-20266 Upstream-Status: Backport [https://github.com/rpm-software-management/rpm/pull/1587/commits/9646711891df851dfbf7ef54cc171574a0914b15]
Note: Hunk#2 and Hunk#3 refreshed to apply patch and match value of dl_max variable to make it with current version Signed-off-by: Ranjitsinh Rathod <ranjitsinh.rat...@kpit.com> --- .../rpm/files/CVE-2021-20266.patch | 108 ++++++++++++++++++ meta/recipes-devtools/rpm/rpm_4.14.2.1.bb | 1 + 2 files changed, 109 insertions(+) create mode 100644 meta/recipes-devtools/rpm/files/CVE-2021-20266.patch diff --git a/meta/recipes-devtools/rpm/files/CVE-2021-20266.patch b/meta/recipes-devtools/rpm/files/CVE-2021-20266.patch new file mode 100644 index 0000000000..d8b91d4f8e --- /dev/null +++ b/meta/recipes-devtools/rpm/files/CVE-2021-20266.patch @@ -0,0 +1,108 @@ +From 9646711891df851dfbf7ef54cc171574a0914b15 Mon Sep 17 00:00:00 2001 +From: Demi Marie Obenour <ath...@invisiblethingslab.com> +Date: Mon, 8 Feb 2021 16:05:01 -0500 +Subject: [PATCH] hdrblobInit() needs bounds checks too + +Users can pass untrusted data to hdrblobInit() and it must be robust +against this. + +Backported from commit 8f4b3c3cab8922a2022b9e47c71f1ecf906077ef + +Upstream-Status: Backport [https://github.com/rpm-software-management/rpm/pull/1587/commits/9646711891df851dfbf7ef54cc171574a0914b15] +CVE: CVE-2021-20266 +Signed-off-by: Ranjitsinh Rathod <ranjitsinh.rat...@kpit.com> +--- + lib/header.c | 48 +++++++++++++++++++++++++++++++----------------- + 1 file changed, 31 insertions(+), 17 deletions(-) + +diff --git a/lib/header.c b/lib/header.c +index 6af48e61af..46ded5dd99 100644 +--- a/lib/header.c ++++ b/lib/header.c +@@ -11,6 +11,7 @@ + #include "system.h" + #include <netdb.h> + #include <errno.h> ++#include <inttypes.h> + #include <rpm/rpmtypes.h> + #include <rpm/rpmstring.h> + #include "lib/header_internal.h" +@@ -1910,6 +1911,25 @@ hdrblob hdrblobFree(hdrblob blob) + return NULL; + } + ++static rpmRC hdrblobVerifyLengths(rpmTagVal regionTag, uint32_t il, uint32_t dl, ++ char **emsg) { ++ uint32_t il_max = HEADER_TAGS_MAX; ++ uint32_t dl_max = HEADER_DATA_MAX; ++ if (regionTag == RPMTAG_HEADERSIGNATURES) { ++ il_max = 32; ++ dl_max = 8192; ++ } ++ if (hdrchkRange(il_max, il)) { ++ rasprintf(emsg, _("hdr tags: BAD, no. of tags(%" PRIu32 ") out of range"), il); ++ return RPMRC_FAIL; ++ } ++ if (hdrchkRange(dl_max, dl)) { ++ rasprintf(emsg, _("hdr data: BAD, no. of bytes(%" PRIu32 ") out of range"), dl); ++ return RPMRC_FAIL; ++ } ++ return RPMRC_OK; ++} ++ + rpmRC hdrblobRead(FD_t fd, int magic, int exact_size, rpmTagVal regionTag, hdrblob blob, char **emsg) + { + int32_t block[4]; +@@ -1922,13 +1942,6 @@ rpmRC hdrblobRead(FD_t fd, int magic, int exact_size, rpmTagVal regionTag, hdrbl + size_t nb; + rpmRC rc = RPMRC_FAIL; /* assume failure */ + int xx; +- int32_t il_max = HEADER_TAGS_MAX; +- int32_t dl_max = HEADER_DATA_MAX; +- +- if (regionTag == RPMTAG_HEADERSIGNATURES) { +- il_max = 32; +- dl_max = 8192; +- } + + memset(block, 0, sizeof(block)); + if ((xx = Freadall(fd, bs, blen)) != blen) { +@@ -1941,15 +1954,9 @@ rpmRC hdrblobRead(FD_t fd, int magic, int exact_size, rpmTagVal regionTag, hdrbl + goto exit; + } + il = ntohl(block[2]); +- if (hdrchkRange(il_max, il)) { +- rasprintf(emsg, _("hdr tags: BAD, no. of tags(%d) out of range"), il); +- goto exit; +- } + dl = ntohl(block[3]); +- if (hdrchkRange(dl_max, dl)) { +- rasprintf(emsg, _("hdr data: BAD, no. of bytes(%d) out of range"), dl); ++ if (hdrblobVerifyLengths(regionTag, il, dl, emsg)) + goto exit; +- } + + nb = (il * sizeof(struct entryInfo_s)) + dl; + uc = sizeof(il) + sizeof(dl) + nb; +@@ -1993,11 +2000,18 @@ rpmRC hdrblobInit(const void *uh, size_t uc, + struct hdrblob_s *blob, char **emsg) + { + rpmRC rc = RPMRC_FAIL; +- + memset(blob, 0, sizeof(*blob)); ++ if (uc && uc < 8) { ++ rasprintf(emsg, _("hdr length: BAD")); ++ goto exit; ++ } ++ + blob->ei = (int32_t *) uh; /* discards const */ +- blob->il = ntohl(blob->ei[0]); +- blob->dl = ntohl(blob->ei[1]); ++ blob->il = ntohl((uint32_t)(blob->ei[0])); ++ blob->dl = ntohl((uint32_t)(blob->ei[1])); ++ if (hdrblobVerifyLengths(regionTag, blob->il, blob->dl, emsg) != RPMRC_OK) ++ goto exit; ++ + blob->pe = (entryInfo) &(blob->ei[2]); + blob->pvlen = sizeof(blob->il) + sizeof(blob->dl) + + (blob->il * sizeof(*blob->pe)) + blob->dl; diff --git a/meta/recipes-devtools/rpm/rpm_4.14.2.1.bb b/meta/recipes-devtools/rpm/rpm_4.14.2.1.bb index 018b2f8700..c93654aa8f 100644 --- a/meta/recipes-devtools/rpm/rpm_4.14.2.1.bb +++ b/meta/recipes-devtools/rpm/rpm_4.14.2.1.bb @@ -45,6 +45,7 @@ SRC_URI = "git://github.com/rpm-software-management/rpm;branch=rpm-4.14.x \ file://0001-Rip-out-partial-support-for-unused-MD2-and-RIPEMD160.patch \ file://0001-rpmplugins.c-call-dlerror-prior-to-dlsym.patch \ file://CVE-2021-3421.patch \ + file://CVE-2021-20266.patch \ " PE = "1" -- 2.17.1 This message contains information that may be privileged or confidential and is the property of the KPIT Technologies Ltd. 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